• For dictionaries in printed form, these references are constructed like references to chapters in books. The publisher should also be included.
• If no author is stated, but there is an organization behind the source (e.g. Merriam-Webster) this is stated, then exclude the publishing information. 
• Add web address if it is an online source. 
• Include a retrieval date, i.e. the date when you accessed the source if the web page is continuously updated. Read more about retrieval dates on APA: Stye: Retrieval dates.

In printed form

Basic format: 

Author, A. A. (year). Title of entry. In B. Editor (Ed./Eds.), Title of encyclopedia or dictionary. Publisher.
Note: Ed. = one editor, Eds. = two or more editors.

Example: 

Lutz, W. (1996). Doublespeak. In T. Enos (Ed.), Encyclopedia of rhetoric and composition: Communication from ancient times to the information age (pp. 198–199). Garland Publishing.

In digital form

Basic format: 

Author, A. A. (year). Title of entry. Title of encyclopedia or dictionary. Retrieved from https://xxxx

If no year can be verified, write (n.d) instead (n.d. = no date).

Example: 

​Graham, G. (2017). Behaviorism. In E. N. Zalta (Ed.), The Stanford encyclopedia of philosophy (2017 ed.). Retrieved February 15, 2019, from https://plato.stanford.edu/entries/behaviorism/

In-text citations:

• And this is how the term Doublespeak is defined (Lutz, 1996).
• Graham (2016) states that . . .
• In 1996 Lutz defines this as . . .

Read more about encyclopedia & dictionary entries on APA: Dictionary Entry References.