Citazione Stile APA (7a Edizione)

Marx, M. H., & Hillix, W. A. (1979). Systems and theories in psychology (3rd ed.). Mc-Graw-Hill.

Citazione stile Chigago Style (17a edizione)

Marx, Melvin H., e William A. Hillix. Systems and Theories in Psychology. 3rd ed. New York: Mc-Graw-Hill, 1979.

Citatione MLA (9a ed.)

Marx, Melvin H., e William A. Hillix. Systems and Theories in Psychology. 3rd ed. Mc-Graw-Hill, 1979.