APA (7e ed.) Bronvermelding
Ryckman, R. M. (1989). Theories of personality (3rd ed.). Brooks/Cole Publishing Company.
Chicago (17e ed.) Bronvermelding
Ryckman, Richard M. Theories of Personality. 3rd ed. California: Brooks/Cole Publishing Company, 1989.
MLA (9e ed.) Bronvermelding
Ryckman, Richard M. Theories of Personality. 3rd ed. Brooks/Cole Publishing Company, 1989.
Let op: Deze citaties zijn niet altijd 100% accuraat.