APA (7th ed.) Zitazioa
Liebert, R. .., & Spiegler,Michael.D. (1990). Personality: Strategies and issues (6th ed.). Brooks/Cole Publishing Co..
Chicago Style (17th ed.) Zitazioa
Liebert, Robert .M, eta Spiegler,Michael.D. Personality: Strategies and Issues. 6th ed. California.: Brooks/Cole Publishing Co., 1990.
MLA (9th ed.) Zitazioa
Liebert, Robert .M, eta Spiegler,Michael.D. Personality: Strategies and Issues. 6th ed. Brooks/Cole Publishing Co., 1990.
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