Weiten, W., & Halpern, D. F. (2001). Psychology: Themes and variations (5th ed.). Wadsworth Thomson Learning.
Cita Chicago (17th ed.)Weiten, Wayne, i Diane F. Halpern. Psychology: Themes and Variations. 5th ed. Belmont, CA: Wadsworth Thomson Learning, 2001.
Cita MLA (9th ed.)Weiten, Wayne, i Diane F. Halpern. Psychology: Themes and Variations. 5th ed. Wadsworth Thomson Learning, 2001.
Atenció: Aquestes cites poden no estar 100% correctes.