Dyfyniad APA

Lefton, L. A., & Valvatne, L. (1986). Mastering Psychology (2nd ed.). Allyn & Bacon.

Dyfyniad Arddull Chicago

Lefton, Lester A., and Laura Valvatne. Mastering Psychology. 2nd ed. Boston: Allyn & Bacon, 1986.

Dyfyniad MLA

Lefton, Lester A., and Laura Valvatne. Mastering Psychology. 2nd ed. Allyn & Bacon, 1986.

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