Dyfyniad APA
Marx, M. H., & Hillix, W. A. (1979). Systems and theories in psychology (3rd ed.). Mc-Graw-Hill.
Dyfyniad Arddull Chicago
Marx, Melvin H., and William A. Hillix. Systems and Theories in Psychology. 3rd ed. New York: Mc-Graw-Hill, 1979.
Dyfyniad MLA
Marx, Melvin H., and William A. Hillix. Systems and Theories in Psychology. 3rd ed. Mc-Graw-Hill, 1979.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.