Lua APA (7ú heag.)

Engler, B. (1995). Personality theories: An introduction (4th ed.). Houghton Mifflin.

Lua i Stíl Chicago (17ú heag.)

Engler, Barbara. Personality Theories: An Introduction. 4th ed. Boston: Houghton Mifflin, 1995.

Lua MLA (9ú heag.)

Engler, Barbara. Personality Theories: An Introduction. 4th ed. Houghton Mifflin, 1995.

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