Lua APA (7ú heag.)

Engler, B. (1985). Personality Theories: An introduction (2nd ed.). Houghton Mifflin Company.

Lua i Stíl Chicago (17ú heag.)

Engler, Barbara. Personality Theories: An Introduction. 2nd ed. Boston: Houghton Mifflin Company, 1985.

Lua MLA (9ú heag.)

Engler, Barbara. Personality Theories: An Introduction. 2nd ed. Houghton Mifflin Company, 1985.

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