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

Each citation style handles this situation a little bit differently! Here are specific examples of how it works in the three major citation styles:

In-Text Citations

When an author or author(s) published multiple sources in the same year, include a lowercase letter immediately following the date. Begin this lettering with "a" and continue in alphabetical order.

(Author, Publication Datea)

(Author, Publication Dateb)

(Author & Author, Publication Datea)

(Author & Author, Publication Dateb)

(Kelly & West, 2018a)

(Kelly & West, 2018b)

Author (Publication Datea)

Author (Publication Dateb)

Author and Author (Publication Datea)

Author and Author (Publication Dateb)

Kelly and West (2018a)

Kelly and West (2018b)

More Information

APA guide (Shapiro Library)
APA Blog (APA)

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.

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