APA (7th ed.) Citation

Ryckman, R. M. (1997). Theories of personality (6η έκδ.). Brooks/Cole.

Chicago Style (17th ed.) Citation

Ryckman, Richard M. Theories of Personality. 6η έκδ. Pacific Grove: Brooks/Cole, 1997.

MLA (8th ed.) Citation

Ryckman, Richard M. Theories of Personality. 6η έκδ. Brooks/Cole, 1997.