Last Updated: Jun 22, 2023 Views: 5476

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.

Same Author and Date
  General Format For Example
Parenthetical

(Author, Publication Datea)

(Author, Publication Dateb)


(Author & Author, Publication Datea)

(Author & Author, Publication Dateb)

(Winston, 2017a)

(Winston, 2017b)


(Kelly & West, 2018a)

(Kelly & West, 2018b)

Narrative

Author (Publication Datea)

Author (Publication Dateb)


Author and Author (Publication Datea)

Author and Author (Publication Dateb)

Winston (2017a)

Winston (2017b)


Kelly and West (2018a)

Kelly and West (2018b)

More Information

Further Help

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.

Campus Students

To access academic support, visit your Brightspace course and select “Tutoring and Mentoring” from the Academic Support pulldown menu.

Online Students

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References

American Psychological Association. (2020). Publication manual of the American Psychological Association (7th ed.). https://doi.org/10.1037/0000165-000

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