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Chicago Manual of Style: Author-Date Style

"Find It. Write It. Cite It." The Chicago Manual of Style (CMS) is primarily used in the areas of history, art and government and social sciences

Basic Format


How to Cite Books - Examples

Book with Single Author


Bruice, Paula Yurkanis. 2017. Organic Chemistry. Harlow, Essex: Pearland Education Ltd.

In-text Citation

(Bruice 2017, 85-87)

Book with Two Authors


Buchanan, Heidi, E. and Beth A. McDonough. 2017. The One-Shot Library Instruction Survival Guide. Chicago: American Library Association.

In-text Citation

(Buchanan and McDonough 2017, 110)

Book with Multiple Authors

For a book with Four or More Authors, include all the authors in the reference list. In the text, only mention the first author listed followed by et al.


Simon, Eric, Jean Dickey, Kelly Hogan, and Jane Reece. 2016. Campbell Essential Biology with Physiology. Boston: Pearson.

In-text Citation

(Simon et al. 2016, 12)

Chapter or part of an Edited Book

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


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)


For e-books, include a URL or the name of the database (If it is from a library subscription database).

For other types of e-books, name the format. If no page numbers are available, cite a section title, a chapter, or other number in the text if any (or omit).

E-books from a Subscription Database


Li, Tim and Pang-chi Hsu. 2018. Fundamentals of Tropical Climate Dynamics. New York: Springer, Cham. SpringerLink EPUB.

In-text Citation

(Tim and Hsu 2018, 10)

Other E-books


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

In-text Citation

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

Author-Date Style - Basics

The following examples illustrate the Author-Date System used mostly in the field of Sciences & Social Sciences.

Sources are cited in the text, usually in parentheses, by author’s last name, year of publication and page numbers if needed. It is called in-text citation.

Full bibliographic information is provided at the end of the paper – usually titled ‘References’ or ‘Work Cited’

Examples - Periodicals


Cohen, Michael D. 2017. “School for Suffrage: The American Woman's Republic.” The Good Society 25 (2-3): 209-230. JSTOR.

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.

In-Text Citation

(Cohen 2017, 220)

(Keng et al. 2017, 23)

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. For more than ten authors list the first seven in the Reference list followed by et al.


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, (5): 463–73.

In-text citations

(Bay et al. 2017, 466).

News or Magazine Article


Kolata, Gina. 2017. “How to Lower Your Blood Pressure.” New York Times, November 15, 2017.

Murphy, John. 2017. “Health Dept. goes to Court to Keep Medical Marijuana Panelists' Identities a Secret.” Patriot-News, September 29, 2017, Newspaper Source.

In-text citations

(Murphy 2017)

(Gina 2017)

Thesis or Dissertation


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

In-text citations

(Rutz 2013, 99–100)

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