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APA 7: Reference Works

Information Needed

  • Author(s)
  • Date
  • Title of website or work (italicized)
  • Direct URL

General Format of Reference Work Citation

Group Author (n.d.). Title of website. Retrieved Month day, year, from direct URL is the approved dictionary for use.

When a stable or archived version of the work is cited, a retrieval date is not needed.

When an online reference work is continuously updated and the versions are not archived (as with the APA Dictionary of Psychology and the Dictionary examples), use “n.d.” as the year of publication and include a retrieval date.

Reference Works Reference Citation Examples

Dictionary, thesaurus, or encyclopedia

Note: uses retrieval date

Entry in a dictionary, thesaurus, or encyclopedia, with group author

American Psychological Association. (n.d.). Positive transference. In APA dictionary of psychology. Retrieved August 31, 2019,


Merriam-Webster. (n.d.). Self-report. In dictionary. Retrieved July 12, 2019,


Entry in a dictionary, thesaurus, or encyclopedia, with individual author

Graham, G. (2019). Behaviorism. In E. N. Zalta (Ed.), The Stanford encyclopedia of philosophy (Summer 2019 ed.).

            Stanford University.


Adapted from American Psychological Association publication manual (7th ed.).