Cita APA (7th ed.)
Lefton, L. A., & Valvatne, L. (1986). Mastering Psychology (4th ed.). Allyn & Bacon.
Cita Chicago (17th ed.)
Lefton, Lester A., i Laura Valvatne. Mastering Psychology. 4th ed. Boston: Allyn & Bacon, 1986.
Cita MLA (9th ed.)
Lefton, Lester A., i Laura Valvatne. Mastering Psychology. 4th ed. Allyn & Bacon, 1986.
Atenció: Aquestes cites poden no estar 100% correctes.