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The Complete Guide to Chicago Style

Allison Bressmer

The Chicago Manual of Style (CMOS) is a widely used style guide that covers topics like preparing manuscripts for publication, grammar rules, and word usage. It also offers two style options for source citation .

While Chicago Style is more often used for published works than high school or undergraduate class papers, Kate Turabian developed a simplified version of the CMOS’s citation styles, with modifications that address the needs of student writers.

What Does the Chicago Manual of Style Do?

Chicago manual of style general formatting guidelines, how to format an in-text chicago-style citation, guidelines for formatting reference and bibliography pages, why are citations and references necessary.

The purpose of CMOS, or any style guide, is to create a system of standardization across a publication, company, publishing house, or project, etc.

Language and conventions of language, grammar, and word usage are fluid and influenced by social location or other factors, so style manuals provide rules or guidelines to establish consistency.

Additionally, style guides provide easy navigation for readers by creating a clear framework for how sources are cited, documented, and located, should the reader want to investigate that source further.

The CMOS offers these general guidelines for formatting papers:

• Margins should be no less than 1 inch and no more than 1.5 inches around the paper; margins should be consistent throughout.
• The body of the main text should be double spaced .
• Block quotations, notes, bibliography entries, table titles, and figure captions are single spaced .
• Text should be left-justified .
• New paragraphs should be indented by one half inch.
• Font size and style should be legible . While CMOS does not offer a specific font preference, the Turabian guide recommends Times New Roman (12 point) or Calibri (11 point) for student papers.
• Each page of the document should have a header in the top-right corner that includes the page number .

What About a Title Page?

CMOS does not require a title page. However, if the publication you’re writing for requires one, you’ll need to follow their format.

The Turabian guide states that class papers may require either a title on the first page of text or a title page. If you need to include a title page, the recommendations are as follows:

• Center the title one-third of the way down the page.
• The subtitle , if you have one, goes under the title . Put a colon after the title if you have a subtitle.
• Your name , class information , and the date should be included a few lines (3-4 return hits) later, each a separate line.
• All information should be double-spaced .

What About Headings?

In CMOS, consistency is key. There is no set rule for headings and subheadings, other than that they should be consistent throughout the work. Think of them as visual cues.

A reader should be able to recognize that “this font at that size” is a chapter beginning. Or “that font in this size” signals a main subsection of a chapter, and so on.

Other CMOS Style Elements to Know

Because there is variety even within the CMOS, it’s important to remember to check with your instructor or publisher about the specific style methods they follow and to ensure you understand any preferences not specifically stated in the CMOS guidelines.

Here are some common sticking points you may have questions about.

Introduce acronyms the first time you refer to the entity or concept, etc., that they stand for. The first line of this article demonstrates that practice.

The Chicago Manual of Style (CMOS) is a widely used style guide . . . .

ProWritingAid's Acronym Report checks this for you, highlighting any un-introduced acronyms in your text, as well as any inconsistent acronyms:

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Use words rather than numerals for numbers under 100. For example, write out twenty-eight instead of 28. There are exceptions to this rule: Use numerals when referring to a specific measurement; for example, 1 inch, and when using decimals. Also, for more technical writing, CMOS advocates spelling out numbers one through nine, but using numerals for any figure with two or more digits.

“Block” a prose quotation of five or more lines. This means the entire quote should be indented, or set off, from the surrounding text. Do not use quotation marks around blocked quotations. Use the same font style and size for the blocked quote as you used for the surrounding text.

Use “headline-style” capitalization for titles mentioned in the text, notes, or bibliography. Headline style means the first words of titles and subtitles, as well as any principal words that follow, are capitalized. Principal words include the first and last words of the title, as well as any words that are not conjunctions, articles, or prepositions. Use italics or quotation marks for titles depending on the works they represent.

Figures and Tables

If you include a figure or table in your work, follow these elements of CMOS:

• Position the figure under the information that discusses that figure.
• Put the caption directly under the image or figure and flush with the left edge of the figure. Use single spacing for the caption.
• Leave at least one blank line between the caption and the continuing text in your document.
• Label the image and ensure that labels are consecutive. For example, Figure 1; Figure 2; Figure 2.1.

CMOS offers two options for in-text citations and their respective reference or bibliography pages: author-date and notes and bibliography .

The Author-Date System

The author-date style is used more commonly in physical and social sciences. With this method, sources are cited in the text, usually with a parenthetical citation that includes the author’s last name and the year the cited work was published.

To find full bibliographic information on the source, the reader can consult the reference list and find the corresponding entry.

This method offers the writer some flexibility in how to integrate citations into their texts.

Examples of Author-Date Style

Let's pretend I ran an experiment on the most popular color of M&Ms among five-year-olds. I conducted the study in 2020 (because what else was there to do during a pandemic?), and you want to include my findings in your paper.

With the author-date format, you could use either of these possibilities:

The study revealed that five-year-olds prefer blue and green M&Ms to brown and yellow ones (Bressmer 2020).

Bressmer (2020) determined that five-year-olds prefer blue and green M&Ms to brown and yellow ones.

If I had worked with one or two others—say, Johnson and Smith—on my study, you would simply add their names to the citation, like this:

• The study revealed that five-year-olds prefer blue and green M&Ms to brown and yellow ones (Bressmer, Johnson, and Smith 2020).

If any additional researchers were involved in the study (making the total four or more names), you would use (Bressmer et al. 2020).

If you need to cite more than one reference in a single in-text citation, use semicolons to separate those references.

• One study revealed that five-year-olds prefer blue and green M&Ms to brown and yellow ones, but a subsequent study indicates that blue is preferred even over green (Bressmer 2020; Phillips 2021).

If I had conducted both of those studies (not Phillips), only a comma would be required between the dates: (Bressmer 2020, 2021).

Author-Date Reference List

If you use the author-date style, you must include a list of references as the last page of your work. Each of your in-text citations must have a corresponding entry on the reference list that includes the full bibliographic information for the source.

The reference list should only include sources you’ve cited in the document.

The Notes and Bibliography System

This system is often preferred by those working in the humanities. It has flexibility and provides an opportunity for commenting on sources, if the writer feels a comment is necessary.

In the notes and bibliography style, writers acknowledge they have used a source by putting a superscript number at the end of the sentence in which that source is referenced. If the reference is a direct quote, then the superscript should immediately follow the quotation. The note number should also follow punctuation, rather than precede it.

Footnotes and Endnotes

Using either footnotes or endnotes , the writer includes a numbered note that corresponds to the in-text superscript number either at the bottom of the page on which the reference is used, in which case the note is called a footnote , or in a compiled list of notes at the end of a chapter, or the entire document, called endnotes .

Footnotes and endnotes include bibliographic information for the cited source. These notes then correspond to entries on the last page of the paper, the bibliography.

Usually, the first time a source is listed as a footnote or endnote , it is appropriate to use a full note, which includes full publication details of the source.

If a source is included in subsequent footnotes or endnotes , it’s common practice to use short notes , which include the author’s last name, title of the work, and page number, if relevant. However, always check with your instructor or publisher and follow their recommendations.

Example of Notes and Bibliography Style

Imagine the sentence below appears in the text of a document in which the writer referenced my M&M study. Note the superscript after the referenced material and the corresponding footnote (full-note form) at the “bottom” of my page. A thin line separates footnotes from the main text, and the footnotes appear in a font of the same or smaller size than the main text.

The study revealed that five-year-olds prefer blue and green M&Ms to brown and yellow ones.1

• Allison Bressmer, “The M&M Attraction Study,” The Journal of Imagined Studies 100, no. 1, (August 2020): 5.

A short-note version would simply include

• Bressmer, “The M&M Attraction Study,” 5.

The Notes-Bibliography Style Bibliography Page

While a reference list is required for papers written with the author-date system, a bibliography is not required for works written with the notes-and-bibliography system, though they are generally preferred. Once again, check with your instructor or publisher.

The bibliography includes sources cited in your paper and may list other sources you referenced in preparing the work but did not specifically cite.

For the most part, format the reference and bibliography pages the same way.

Either list starts on a new, blank page that comes at the end of your document.

• Title the document as References or Bibliography , depending on the CMOS citation system used in the document. Center that title word, but do not underline or put it in quotation marks.
• Leave two blank lines between the title and your first entry.
• Single space the lines of each entry; if the entry has more than one line, use a hanging indent for all subsequent lines (this just means the lines are indented, or “tabbed”).
• Leave one blank line between entries.
• Alphabetize entries by author’s name; if no author, then by the first word of the entry (probably the title of the article/work).

What to Include in Chicago-Style Reference and Bibliography Entries

Other than their titles, the only other difference between the reference and bibliography pages is regarding the placement of the publication date. On a reference list, place the year of publication immediately after the author’s name.

Major Elements

Include the following major elements in reference and bibliography entries and separate the elements with periods:

• Author’s name: last name first, with a comma separating the names. For example, Johnson, Joan.

Reminder: on a reference list , the publication date appears directly after the author’s name.

Title: Italicize titles of books and journals. Use quotation marks for titles of articles, chapters, short stories, or poems.

Publication information: Name of journal (or larger work in which the cited article, chapter, etc., appears), publisher, year of publication.

If additional information about the source is available:

• After the title, include others involved in producing the work (editors, translators, compilers); edition number if the work is not the first edition; volume or series numbers.
• After publication information, include page numbers; URLs, or DOIs (digital object identifiers) of sources accessed through electronic databases.

By acknowledging the author of a source cited in your paper, you do the following:

• Uphold standards of intellectual and academic honesty by acknowledging the authors of the information you’ve borrowed for your paper. It’s never okay to try to pass off someone else’s work or ideas as your own—that is called plagiarism.

For more help ensuring your work is presented honestly, sign up for ProWritingAid’s Plagiarism Checks —and rest assured your work will not be stored or sold.

Establish credibility by including the voices and works of others as support for your ideas, arguments, or proposals. When you do this, you validate the credibility of your ideas.

Help your readers by leading them to the source of each of your citations. Should they want to investigate further, your citations will lead to your reference page, which provides the location of your source.

The Chicago Manual of Style offers versatility for writers, allowing them to adapt their citations to the style that suits their work (or their instructor’s or publisher’s request), while ensuring readers can easily identify and locate those cited sources for further investigation.

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Allison Bressmer is a professor of freshman composition and critical reading at a community college and a freelance writer. If she isn’t writing or teaching, you’ll likely find her reading a book or listening to a podcast while happily sipping a semi-sweet iced tea or happy-houring with friends. She lives in New York with her family. Connect at linkedin.com/in/allisonbressmer.

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• Writing Tips

How to Write and Format a Chicago Style Paper [With Examples]

3-minute read

• 18th August 2023

Are you working on a Chicago style project but struggling with the question, “just what is it?!”

Fear not, this post will walk you through Chicago style basics.

What Is Chicago Style?

The Chicago Manual of Style (CMoS) is a comprehensive style guide primarily used by professional writers, publishers, and researchers. It covers various forms of writing, including books, journals, magazines, and other publications. It’s often the go-to style for publishers and editors. CMoS is also known for its emphasis on scholarly writing and is suitable for a wide range of disciplines, including history, literature, the arts, and social sciences.

However, there’s an important distinction between Chicago style and Turabian style , which is essentially a simplified version of CMoS used in scholarly writing. Turabian omits some of the complexities and focuses on the needs of academic writers, especially those in the humanities and social sciences.

With either style, it’s essential to consult the relevant edition of the style guide specified by your institution or publication: either The Chicago Manual of Style or A Manual for Writers by Kate L. Turabian (currently in its ninth edition).

How Are Chicago Style Citations Formatted?

CMoS emphasizes two primary documentation systems : the notes and bibliography system (often used in the humanities) and the author–date system (preferred in the sciences and social sciences). When formatting a CMoS/Turabian paper, you’ll need to adhere to the guidelines associated with your chosen documentation system.

Notes and Bibliography System:

●  In this system, you’ll use footnotes or endnotes to cite sources within the text.

●  A corresponding bibliography is included at the end of the paper, listing all sources in alphabetical order.

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●  Citations typically include author names, titles, publication details, and page numbers.

Author–Date System:

●  In the author–date system, you’ll incorporate in-text citations within parentheses.

●  A reference list is included at the end of the document, providing full details for each cited source.

●  Citations include author’s last names, publication year, and page numbers (if applicable).

What Does Turabian Style Formatting Look Like?

A well-structured Turabian Style paper should adhere to the following formatting guidelines :

•   Title page : Include the title of your paper, your name, the course name/number, instructor’s name, and the date on a separate page, starting a third of the page down. Alternatively, write the title on the first page.
•   Margins : Apply one-inch margins on all sides.
• Indentation and spacing : Indent paragraphs and double-space the main text.
• Font : Use a legible 12-point font (e.g., Times New Roman).
• Page numbers : Number all pages consecutively in the top right corner, starting with the first page. Alternatively, page numbers may be placed at the bottom center of the page.
• Headings and subheadings : Use headline-style capitalization for headings and subheadings, with different levels distinguished.
• Footnotes or in-text citations: Implement your chosen citation system consistently throughout the paper.
• Bibliography or reference list : Include a comprehensive list of all sources used, following Chicago style citation guidelines for your chosen system.

How Should I Choose Which Chicago Style Documentation to Use?

It’s crucial to find out which specific CMoS system is preferred by your institution, publisher, or field of study. Always consult your assignment guidelines or style manual to determine whether you should use the notes and bibliography system or the author–date system. This choice will significantly impact how you format your citations and references.

Remember that mastering CMoS takes practice. By following these guidelines, you’ll be well on your way to crafting polished, professionally formatted papers that meet the expectations of your academic or professional audience.

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Purdue Online Writing Lab Purdue OWL® College of Liberal Arts

Cover Letters

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Introduction

These resources will help you understand and write successful cover letters. To use these pages, you may select links in the navigation bar on the left, you may select links from the list below, or you may advance through the pages using the links at the bottom of each page. Click here to download the PDF file containing sample résumés and employment letters. The cover letter pages are organized into the following sections:

• What is a cover letter?
• Why do I need to do a cover letter?
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• What should my cover letter look like?
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• Introductions
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Attribution

This guide was adapted from the Chicago Style Guide by Cathy Rettberg at Menlo School Library.

• Chicago Manual of Style This link opens in a new window The time-tested guide to style, usage, and grammar in an accessible online format.

Your professors expect to receive papers that are properly formatted and laid out. Use the following guidelines when setting up your paper. It is easiest if you use the correct settings from the beginning; otherwise you will have to go back and reformat your paper.

Overall page layout

• One inch margins on sides, top and bottom.
• Use Times or Times New Roman 12 pt font.
• Double-space the text of the paper.
• Use left-justified text, which will have a ragged right edge. Do not use fully (newspaper-style) justified text.
• Use a 1/2" indent for paragraph beginnings, block quotes and hanging (bibliography) indents.
• Number the pages in the top right corner of the paper, beginning with the first page of text. It's a good idea to include your last name as well, in case pages become separated. Number straight through from the first text page to the final bibliography page but do not count any pages after the end of the text as part of your page count. (A five-page paper may also have a cover page, two pages of notes and one page of bibliography which is nine pieces of paper.)
• Center the title of your paper in the middle of the page, halfway down.
• Center your name directly under the title.
• Your professor's name, course title, and date should be written in three lines and centered at the bottom of the page.
• Use Times or Times New Roman 12 pt font for the title page. Do not try to make your cover page decorative by using bold , underline , or creative fonts.
• Do not put a page number on the cover page, and do not count it as part of the total page count.

Assemble your paper in the following order

• Cover/title page
• Body of the paper
• Appendix (if needed)

Bibliography

Names and numbers.

• Use full names of people and agencies/legislation the first time you use them. For agencies, include the acronym in parentheses after the full name when first used, e.g. Federal Emergency Relief Administration (FERA).
• After the first time you can refer to people by their last name or agencies/bills by their acronyms for the rest of the paper.
• Write out numbers lower than 100. (“All nine members of the Supreme Court...”)

Footnotes and endnotes

• Footnotes go at the bottom of the page where the reference occurs; endnotes go on a separate page after the body of the paper. Both use the same formatting guidelines.
• Within the essay text: put the note number at the end of the sentence where the reference occurs, even if the cited material is mentioned at the beginning of the sentence.
• The note number goes after all other punctuation.
• Be sure to use Arabic numerals (1, 2, 3) nor Roman (i, ii, iii).
• Put the word Notes (not Endnotes) at the top of the page with your endnotes. Use Times/Times New Roman 10 pt font.
• Single space each entry; double space between entries.
• Indent the first line of each note.
• Never reuse a number - use a new number for each reference, even if you have used that reference previously.
• Be sure to look at shortened form examples for sources you refer to more than once.
• To cite multiple sources in a single note, separate the two citations with a semicolon. Never use two note numbers at the end of a sentence.
• Your bibliography should go on a separate page, with the word Bibliography centered at the top of the page in Times/Times New Roman 12 pt font. Do not use bold or large size font for the heading.
• Be sure to use proper formatting - note and bibliography styles are different.
• Use a "hanging indent" - the first line of the citation begins at the margin, subsequent lines are indented.
• If your source has no author, alphabetize by title within the authors - don't make a separate list.
• Don't separate primary and secondary sources unless your professor requests it.

Watch out for these common errors:

• Note format uses first name last name, bibliography uses last name, first name.
• In your notes, do not reuse numbers! Each citation gets a new number.
• Pay attention to indents. Notes use a first line indent, a bibliography uses a hanging indent.
• A bibliography goes in alphabetical order by author (or title if there is no author). Notes are numbered and are listed in the order the sources are used.
• Don't put Works Cited at the top of your bibliography - that is MLA style.
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Chicago style guide: Letter/memo

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Citing a letter, memo, or other correspondence

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Go to Index

Notes and Bibliography: Sample Citations

Go to Author-Date: Sample Citations

The following examples illustrate the notes and bibliography system. Sample notes show full citations followed by shortened citations for the same sources. Sample bibliography entries follow the notes. For more details and many more examples, see chapter 14 of The Chicago Manual of Style . For examples of the same citations using the author-date system, follow the Author-Date link above.

1. Zadie Smith, Swing Time   (New York: Penguin Press, 2016), 315–16.

2. Brian Grazer and Charles Fishman, A Curious Mind: The Secret to a Bigger Life (New York: Simon & Schuster, 2015), 12.

Shortened notes

3. Smith, Swing Time , 320.

4. Grazer and Fishman, Curious Mind , 37.

Bibliography entries (in alphabetical order)

Grazer, Brian, and Charles Fishman. A Curious Mind: The Secret to a Bigger Life . New York: Simon & Schuster, 2015.

Smith, Zadie. Swing Time . New York: Penguin Press, 2016.

For many more examples, covering virtually every type of book, see 14.100–163 in The Chicago Manual of Style .

Chapter or other part of an edited book

In a note, cite specific pages. In the bibliography, include the page range for the chapter or part.

1. Henry David Thoreau, “Walking,” in The Making of the American Essay , ed. John D’Agata (Minneapolis: Graywolf Press, 2016), 177–78.

Shortened note

2. Thoreau, “Walking,” 182.

Bibliography entry

Thoreau, Henry David. “Walking.” In The Making of the American Essay , edited by John D’Agata, 167–95. Minneapolis: Graywolf Press, 2016.

In some cases, you may want to cite the collection as a whole instead.

1. John D’Agata, ed., The Making of the American Essay (Minneapolis: Graywolf Press, 2016), 177–78.

2. D’Agata, American Essay , 182.

D’Agata, John, ed. The Making of the American Essay . Minneapolis: Graywolf Press, 2016.

For more examples, see 14.103–5 and 14.106–12 in The Chicago Manual of Style .

Translated book

1. Jhumpa Lahiri, In Other Words , trans. Ann Goldstein (New York: Alfred A. Knopf, 2016), 146.

2. Lahiri, In Other Words , 184.

Lahiri, Jhumpa. In Other Words . Translated by Ann Goldstein. New York: Alfred A. Knopf, 2016.

For books consulted online, include a URL or the name of the database. For other types of e-books, name the format. If no fixed page numbers are available, cite a section title or a chapter or other number in the notes, if any (or simply omit).

1. Herman Melville, Moby-Dick; or, The Whale (New York: Harper & Brothers, 1851), 627, http://mel.hofstra.edu/moby-dick-the-whale-proofs.html.

2. Philip B. Kurland and Ralph Lerner, eds., The Founders’ Constitution (Chicago: University of Chicago Press, 1987), chap. 10, doc. 19, http://press-pubs.uchicago.edu/founders/.

3. Brooke Borel, The Chicago Guide to Fact-Checking (Chicago: University of Chicago Press, 2016), 92, ProQuest Ebrary.

4. Jane Austen, Pride and Prejudice (New York: Penguin Classics, 2007), chap. 3, Kindle.

5. Melville, Moby-Dick , 722–23.

6. Kurland and Lerner, Founder s ’ Constitution , chap. 4, doc. 29.

7. Borel, Fact-Checking , 104–5.

8. Austen, Pride and Prejudice , chap. 14.

Austen, Jane. Pride and Prejudice . New York: Penguin Classics, 2007. Kindle.

Borel, Brooke. The Chicago Guide to Fact-Checking . Chicago: University of Chicago Press, 2016. ProQuest Ebrary.

Kurland, Philip B., and Ralph Lerner, eds. The Founders’ Constitution . Chicago: University of Chicago Press, 1987. http://press-pubs.uchicago.edu/founders/.

Melville, Herman. Moby-Dick; or, The Whale . New York: Harper & Brothers, 1851. http://mel.hofstra.edu/moby-dick-the-whale-proofs.html.

For more examples, see 14.1 59 –63 in The Chicago Manual of Style .

Journal article

In a note, cite specific page numbers. In the bibliography, include the page range for the whole article. For articles consulted online, include a URL or the name of the database. Many journal articles list a DOI (Digital Object Identifier). A DOI forms a permanent URL that begins https://doi.org/. This URL is preferable to the URL that appears in your browser’s address bar.

1. Susan Satterfield, “Livy and the Pax Deum ,” Classical Philology 111, no. 2 (April 2016): 170.

2. Shao-Hsun Keng, Chun-Hung Lin, and Peter F. Orazem, “Expanding College Access in Taiwan, 1978–2014: Effects on Graduate Quality and Income Inequality,” Journal of Human Capital 11, no. 1 (Spring 2017): 9–10, https://doi.org/10.1086/690235.

3. Peter LaSalle, “Conundrum: A Story about Reading,” New England Review 38, no. 1 (2017): 95, Project MUSE.

4. Satterfield, “Livy,” 172–73.

5. Keng, Lin, and Orazem, “Expanding College Access,” 23.

6. LaSalle, “Conundrum,” 101.

Keng, Shao-Hsun, Chun-Hung Lin, and Peter F. Orazem. “Expanding College Access in Taiwan, 1978–2014: Effects on Graduate Quality and Income Inequality.” Journal of Human Capital 11, no. 1 (Spring 2017): 1–34. https://doi.org/10.1086/690235.

LaSalle, Peter. “Conundrum: A Story about Reading.” New England Review 38, no. 1 (2017): 95–109. Project MUSE.

Satterfield, Susan. “Livy and the Pax Deum .” Classical Philology 111, no. 2 (April 2016): 165–76.

Journal articles often list many authors, especially in the sciences. If there are four or more authors, list up to ten in the bibliography; in a note, list only the first, followed by et al . (“and others”). For more than ten authors (not shown here), list the first seven in the bibliography, followed by et al .

7. Rachel A. Bay et al., “Predicting Responses to Contemporary Environmental Change Using Evolutionary Response Architectures,” American Naturalist 189, no. 5 (May 2017): 465, https://doi.org/10.1086/691233.

8. Bay et al., “Predicting Responses,” 466.

Bay, Rachael A., Noah Rose, Rowan Barrett, Louis Bernatchez, Cameron K. Ghalambor, Jesse R. Lasky, Rachel B. Brem, Stephen R. Palumbi, and Peter Ralph. “Predicting Responses to Contemporary Environmental Change Using Evolutionary Response Architectures.” American Naturalist 189, no. 5 (May 2017): 463–73. https://doi.org/10.1086/691233.

For more examples, see 14.1 68 – 87 in The Chicago Manual of Style .

News or magazine article

Articles from newspapers or news sites, magazines, blogs, and the like are cited similarly. Page numbers, if any, can be cited in a note but are omitted from a bibliography entry. If you consulted the article online, include a URL or the name of the database.

1. Rebecca Mead, “The Prophet of Dystopia,” New Yorker , April 17, 2017, 43.

2. Farhad Manjoo, “Snap Makes a Bet on the Cultural Supremacy of the Camera,” New York Times , March 8, 2017, https://www.nytimes.com/2017/03/08/technology/snap-makes-a-bet-on-the-cultural-supremacy-of-the-camera.html.

3. Rob Pegoraro, “Apple’s iPhone Is Sleek, Smart and Simple,” Washington Post , July 5, 2007, LexisNexis Academic.

4. Tanya Pai, “The Squishy, Sugary History of Peeps,” Vox , April 11, 2017, http://www.vox.com/culture/2017/4/11/15209084/peeps-easter.

5. Mead, “Dystopia,” 47.

6. Manjoo, “Snap.”

7. Pegoraro, “Apple’s iPhone.”

8. Pai, “History of Peeps.”

Manjoo, Farhad. “Snap Makes a Bet on the Cultural Supremacy of the Camera.” New York Times , March 8, 2017. https://www.nytimes.com/2017/03/08/technology/snap-makes-a-bet-on-the-cultural-supremacy-of-the-camera.html.

Mead, Rebecca. “The Prophet of Dystopia.” New Yorker , April 17, 2017.

Pai, Tanya. “The Squishy, Sugary History of Peeps.” Vox , April 11, 2017. http://www.vox.com/culture/2017/4/11/15209084/peeps-easter.

Pegoraro, Rob. “Apple’s iPhone Is Sleek, Smart and Simple.” Washington Post , July 5, 2007. LexisNexis Academic.

Readers’ comments are cited in the text or in a note but omitted from a bibliography.

9. Eduardo B (Los Angeles), March 9, 2017, comment on Manjoo, “Snap.”

For more examples, see 14.1 88 – 90 (magazines), 14.191–200 (newspapers), and 14.208 (blogs) in The Chicago Manual of Style .

Book review

1. Michiko Kakutani, “Friendship Takes a Path That Diverges,” review of Swing Time , by Zadie Smith, New York Times , November 7, 2016.

2. Kakutani, “Friendship.”

Kakutani, Michiko. “Friendship Takes a Path That Diverges.” Review of Swing Time , by Zadie Smith. New York Times , November 7, 2016.

1. Kory Stamper, “From ‘F-Bomb’ to ‘Photobomb,’ How the Dictionary Keeps Up with English,” interview by Terry Gross, Fresh Air , NPR, April 19, 2017, audio, 35:25, http://www.npr.org/2017/04/19/524618639/from-f-bomb-to-photobomb-how-the-dictionary-keeps-up-with-english.

2. Stamper, interview.

Stamper, Kory. “From ‘F-Bomb’ to ‘Photobomb,’ How the Dictionary Keeps Up with English.” Interview by Terry Gross. Fresh Air , NPR, April 19, 2017. Audio, 35:25. http://www.npr.org/2017/04/19/524618639/from-f-bomb-to-photobomb-how-the-dictionary-keeps-up-with-english.

Thesis or dissertation

1. Cynthia Lillian Rutz, “ King Lear and Its Folktale Analogues” (PhD diss., University of Chicago, 2013), 99–100.

2. Rutz, “ King Lear ,” 158.

Rutz, Cynthia Lillian. “ King Lear and Its Folktale Analogues.” PhD diss., University of Chicago, 2013.

Website content

It is often sufficient simply to describe web pages and other website content in the text (“As of May 1, 2017, Yale’s home page listed . . .”). If a more formal citation is needed, it may be styled like the examples below. For a source that does not list a date of publication or revision, include an access date (as in example note 2).

1. “Privacy Policy,” Privacy & Terms, Google, last modified April 17, 2017, https://www.google.com/policies/privacy/.

2. “About Yale: Yale Facts,” Yale University, accessed May 1, 2017, https://www.yale.edu/about-yale/yale-facts.

3. Katie Bouman, “How to Take a Picture of a Black Hole,” filmed November 2016 at TEDxBeaconStreet, Brookline, MA, video, 12:51, https://www.ted.com/talks/katie_bouman_what_does_a_black_hole_look_like.

4. Google, “Privacy Policy.”

5. “Yale Facts.”

6. Bouman, “Black Hole.”

Bouman, Katie. “How to Take a Picture of a Black Hole.” Filmed November 2016 at TEDxBeaconStreet, Brookline, MA. Video, 12:51. https://www.ted.com/talks/katie_bouman_what_does_a_black_hole_look_like.

Google. “Privacy Policy.” Privacy & Terms. Last modified April 17, 2017. https://www.google.com/policies/privacy/.

Yale University. “About Yale: Yale Facts.” Accessed May 1, 2017. https://www.yale.edu/about-yale/yale-facts.

For more examples, see 14. 20 5–10 in The Chicago Manual of Style . For multimedia, including live performances, see 14. 261–68 .

Social media content

Citations of content shared through social media can usually be limited to the text (as in the first example below). A note may be added if a more formal citation is needed. In rare cases, a bibliography entry may also be appropriate. In place of a title, quote up to the first 160 characters of the post. Comments are cited in reference to the original post.

Conan O’Brien’s tweet was characteristically deadpan: “In honor of Earth Day, I’m recycling my tweets” (@ConanOBrien, April 22, 2015).

1. Pete Souza (@petesouza), “President Obama bids farewell to President Xi of China at the conclusion of the Nuclear Security Summit,” Instagram photo, April 1, 2016, https://www.instagram.com/p/BDrmfXTtNCt/.

2. Chicago Manual of Style, “Is the world ready for singular they? We thought so back in 1993,” Facebook, April 17, 2015, https://www.facebook.com/ChicagoManual/posts/10152906193679151.

3. Souza, “President Obama.”

4. Michele Truty, April 17, 2015, 1:09 p.m., comment on Chicago Manual of Style, “singular they.”

Chicago Manual of Style. “Is the world ready for singular they? We thought so back in 1993.” Facebook, April 17, 2015. https://www.facebook.com/ChicagoManual/posts/10152906193679151.

Personal communication

Personal communications, including email and text messages and direct messages sent through social media, are usually cited in the text or in a note only; they are rarely included in a bibliography.

1. Sam Gomez, Facebook message to author, August 1, 2017.

Chicago Style Guide, for 17th Edition

Paper formatting.

• Style Handbooks
• Footnotes vs. Endnotes
• Books / E-books
• Interviews / Personal Communications
• Audiovisual Materials
• Shortened Citations
• Author-Date References
• Books / E-Books
• Journal Articles
• Magazine Articles
• Newspaper Articles
• Interviews / Personal Communication
• Website / Webpage

View sample paper

Note-- This paper is written using the footnote/endnote style. The same general formatting rules apply to the author/date format.  

General Formatting

• 1" margins on all four sides
• Times New Roman; 12 pt. font
• Block quotes
• Table Titles
• Figure Captions
• Use a 1/2” indent for paragraph beginnings, block quotes and bibliographic indents.
• Bibliographic and notation entries should be single spaced internally, but contain a space between each entry.
• Page numbers should be placed in the header of the first page of text, beginning with number 1. Continue your page numbers till the end of your bibliography.
• Longer publications should use Subheadings.
• Cover/Title page
• Body of the paper
• Appendix (if needed)
• Endnotes (if using endnote style)

Bibliography

Title/Cover Page

• ​Center the title of your page around half-way down.
• If your paper has a subtitle, end the title line with a colon and place the subtitle on the next line.
• Center your name directly under the title.
• Center your teacher’s name, course title, and date, in three separate lines, directly underneath your name.
• Do not bold, underline, or otherwise decorate your title.
• Do not put a page number on your cover page and do not include it in your page count total.

Names and Numbers

• Use the full name of any person or agency the first time you reference them in a paper. For agencies, include the acronym in parentheses after the full name when first used, e.g. Federal Emergency Relief Administration (FERA). After that, you may choose to use only a person’s last name, or agency acronym.
• Write out any numbers lower than 100.

  Footnotes/Endnotes

• Footnotes will always appear at the bottom of the page where the reference occurs and endnotes go on a separate page after the body of the paper.
• Place the note number at the end of the sentence in which the reference occurs and after any punctuation; remember to superscript it.
• If using endnotes, title the top of the first page as ‘Notes’ in 12 pt. Times New Roman font. Do not embolden the title.
• All notes should be typed in 12pt font using Times New Roman.
• Within the notes themselves, numbers are full-sized, and are followed by a period.
• Indent the first line of any footnote 1/2” from the margin. Other lines will be flushed left (this formatting is opposite of the bibliography).
• Notes should be typed using single-space, but different notes should contain a space between them.
• Only use Arabic numerals, not Roman.
• Never reuse a number.
• Use a shortened citation for sources you refer to more than once.
• If citing multiple sources in a single note, separate each citation with a semicolon.
• Never use two note numbers at the end of a sentence (see above).
• If citing the same work again immediately after you've already cited it, use ibid .
• The bibliography should start on a new page, and be titled ‘Bibliography’ at the top in 12 pt. Times New Roman font. Do not embolden the title.
• Use proper formatting for each type of source and always using a hanging indent. The first line of the citation will begin on the margin, subsequent lines are indented (opposite of a footnote/endnote).
• The bibliography must be ordered alphabetically.
• Entries should be typed single-space with a blank line between each separate citation.
• If you have multiple bibliographic entries from the same author, it is acceptable to use what is called the ‘3-em’ dash to replace the name of the content creators. For Example:

Judt, Tony.  A Grand Illusion ?  An Essay on Europe. New York: Hill and Wang, 1996.

—.  Reappraisals: Reflections on the Forgotten Twentieth Century. New York: Penguin Press, 2008.

—, ed.  Resistance and Revolution in Mediterranean Europe, 1939-1948. New York: Routledge, 1989.

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