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.