APA (7th ed.) Citation

Ryckman, R. M. (1989). Theories of personality (4th ed.). Brooks/Cole Pub. Co..

Chicago Style (17th ed.) Citation

Ryckman, Richard M. Theories of Personality. 4th ed. Pacific Grove, Calif.: Brooks/Cole Pub. Co., 1989.

MLA (9th ed.) Citation

Ryckman, Richard M. Theories of Personality. 4th ed. Brooks/Cole Pub. Co., 1989.

Warning: These citations may not always be 100% accurate.