Dyfyniad APA

Ryckman, R. M. (1989). Theories of personality (3rd ed.). Brooks/Cole Publishing Company.

Dyfyniad Arddull Chicago

Ryckman, Richard M. Theories of Personality. 3rd ed. California: Brooks/Cole Publishing Company, 1989.

Dyfyniad MLA

Ryckman, Richard M. Theories of Personality. 3rd ed. Brooks/Cole Publishing Company, 1989.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.