Chicago Manual of Style Citations: Author-Date Citations

Author-Date System

The author-date system is more common in the sciences and social sciences. In this system, sources are briefly cited in the text, usually in parentheses, by author’s last name and year of publication. Each in-text citation matches up with an entry in a reference list, where full bibliographic information is provided.

Citing sources in this style consists of two parts:

  1. An in-text citation/A parenthetical in-text
  2. A reference list//A Bibliographic Citation

The in-text citation points the reader to the full information about the source found in the reference list.


Reference list entry

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

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

In-text citations

(Grazer and Fishman 2015, 12)

(Smith 2016, 315–16)

For more examples, see 15.40–45 in The Chicago Manual of Style.

Chapter or Other Part of an Edited Book

In the reference list, include the page range for the chapter or part. In the text, cite specific pages.

Reference list entry

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

In-text citation

(Thoreau 2016, 177–78)

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

Reference list entry

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

In-text citation

(D’Agata 2016, 177–78)

For more details, see 15.36 and 15.42 in The Chicago Manual of Style.

Translated Book

Reference list entry

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

In-text citation

(Lahiri 2016, 146)

Electronic Book

For books consulted online, include a URL or the name of the database in the reference list entry. 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 text, if any (or simply omit).

Reference list entries (in alphabetical order)

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

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

Kurland, Philip B., and Ralph Lerner, eds. 1987. The Founders’ Constitution. Chicago: University of Chicago Press.

Melville, Herman. 1851. Moby-Dick; or, The Whale. New York: Harper & Brothers.

In-text citations

(Austen 2007, chap. 3)

(Borel 2016, 92)

(Kurland and Lerner 1987, chap. 10, doc. 19)

(Melville 1851, 627)

Journal Article

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

Reference list entries (in alphabetical order)

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

LaSalle, Peter. 2017. “Conundrum: A Story about Reading.” New England Review 38 (1): 95–109. Project MUSE.

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

In-text citations

(Keng, Lin, and Orazem 2017, 9–10)

(LaSalle 2017, 95)

(Satterfield 2016, 170)

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

Reference list entry

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

(Bay et al. 2017, 465)

For more examples, see  The Chicago Manual of Style.

News or Magazine Article

Articles from newspapers or news sites, magazines, blogs, and the like are cited similarly. In the reference list, it can be helpful to repeat the year with sources that are cited also by month and day. Page numbers, if any, can be cited in the text but are omitted from a reference list entry. If you consulted the article online, include a URL or the name of the database.

Reference list entries (in alphabetical order)

Manjoo, Farhad. 2017. “Snap Makes a Bet on the Cultural Supremacy of the Camera.” New York Times, March 8, 2017.

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

Pai, Tanya. 2017. “The Squishy, Sugary History of Peeps.” Vox, April 11, 2017.

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

In-text citation

(Manjoo 2017)

(Mead 2017, 43)

(Pai 2017

(Pegoraro 2007)

Readers’ comments are cited in the text but omitted from a reference list.

In-text citation

(Eduardo B [Los Angeles], March 9, 2017, comment on Manjoo 2017)

For more examples, see 15.49 (newspapers and magazines) and 15.51 (blogs) in The Chicago Manual of Style.

Book Review

Reference list entry

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

In-text citation

(Kakutani 2016)


Reference list entry

Stamper, Kory. 2017. “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.

In-text citation

(Stamper 2017)

Thesis or Dissertation

Reference list entry

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

In-text citation

(Rutz 2013, 99–100)

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, use n.d. (for “no date”) in place of the year and include an access date.

Reference list entries (in alphabetical order)

Bouman, Katie. 2016. “How to Take a Picture of a Black Hole.” Filmed November 2016 at TEDxBeaconStreet, Brookline, MA. Video, 12:51.

Google. 2017. “Privacy Policy.” Privacy & Terms. Last modified April 17, 2017.

Yale University. n.d. “About Yale: Yale Facts.” Accessed May 1, 2017.

In-text citations

(Bouman 2016)

(Google 2017)

(Yale University, n.d.)

For more examples, see 15.50-52 in The Chicago Manual of Style. For multimedia, including live performances, see 15.57

Privacy & Confidentiality StatementLibrary Code of Conduct