Cita APA (7th ed.)

MARX, M. H., & CRONAN-HILLIX, W. (1987). Systems and theories in psychology.-- Ed.4. McGraw-Hill Book.

Cita Chicago (17th ed.)

MARX, Melvin H., i W.A CRONAN-HILLIX. Systems and Theories in Psychology.-- Ed.4. New York: McGraw-Hill Book, 1987.

Cita MLA (9th ed.)

MARX, Melvin H., i W.A CRONAN-HILLIX. Systems and Theories in Psychology.-- Ed.4. McGraw-Hill Book, 1987.