APA (7th ed.) Zitazioa
Engler, B. (1991). Personality theories: An introduction (3rd ed.). Houghton Mifflin Co..
Chicago Style (17th ed.) Zitazioa
Engler, Barbara. Personality Theories: An Introduction. 3rd ed. Boston, MA: Houghton Mifflin Co., 1991.
MLA (9th ed.) Zitazioa
Engler, Barbara. Personality Theories: An Introduction. 3rd ed. Houghton Mifflin Co., 1991.
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