APA (7th ed.) Zitazioa
Ryckman, R. (1985). Theories of personality (4th ed.). Brooks/cole publ Co..
Chicago Style (17th ed.) Zitazioa
Ryckman, Richard. Theories of Personality. 4th ed. Pacific Grove, California: Brooks/cole publ Co., 1985.
MLA (9th ed.) Zitazioa
Ryckman, Richard. Theories of Personality. 4th ed. Brooks/cole publ Co., 1985.
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