FAQ: How do I cite multiple sources by the same author in Chicago style?

For additional information on citing multiple sources by the same author in Chicago style, please refer to the Chicago Manual of Style This link opens in a new window. Per the Chicago Manual of Style (18th edition). 

Notes and Bibliography

(see section 13.72: The 3-em dash—reasons to avoid This link opens in a new window)

Chicago no longer recommends using the 3-em dash to stand in for the same author(s) in consecutive bibliography entries, preferring instead a repetition of authors’ names.

In a bibliography, titles by the same author are normally listed alphabetically.

For Example

Bibliography

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

Judt, Tony. Reappraisals: Reflections on the Forgotten Twentieth Century. Penguin Press, 2008.

Author-Date References

(see section 13.112: Alphabetical arrangement of reference list entries and section 13.113: The 3-em dash for repeated names in a reference list This link opens in a new window)

Same Author, Different Year

Chicago now recommends repeating the names in a reference list for successive works by the same author(s).

The entries are arranged chronologically by year of publication in ascending order, not alphabetized by title. Undated works designated n.d. or forthcoming follow all dated works.

For example

Reference List

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

Judt, Tony. 2008. Reappraisals: Reflections on the Forgotten Twentieth Century. Penguin Press.

Same Author, Same Year

(see section 13.114: Reference list entries with same author(s), same year This link opens in a new window)

Two or more works by the same author in the same year must be differentiated by the addition of a, b, and so forth (regardless of whether they were authored, edited, compiled or translated), and are listed alphabetically by title. Text citations consist of author and year plus letter.

For example

Reference List

Fogel, Robert William. 2004a. The Escape from Hunger and Premature Death, 1700–2100: Europe, America, and the Third World. Cambridge University Press.

Fogel, Robert William. 2004b. “Technophysio Evolution and the Measurement of Economic Growth.” Journal of Evolutionary Economics 14, no. 2 (June): 217–21.

In-text Citations

(Fogel 2004b, 218)

(Fogel 2004a, 45–46)

More Information

• Chicago Style (Shapiro Library)

Disclaimer

This information is intended to be a guideline, not expert advice. Please be sure to speak to your professor about the appropriate way to cite sources in your class assignments and projects.