FAQ: How do I cite two resources by the same author, published in the same year in APA Style (in-text)?

When an author has 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.

General Format

Parenthetical

(Author, Publication Datea)

(Author, Publication Dateb)

Narrative

Author (Publication Datea)

Author (Publication Dateb)

For Example

Parenthetical

(Winston, 2017a)

(Winston, 2017b)

Narrative

Winston (2017a)

Winston (2017b)

More Examples

• APA Guide - Formatting Authors in In-Text Citations (Shapiro Library)
• Citing Works With the Same Author and Date This link opens in a new window (American Psychological Association)

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.