Cita APA (7a ed.)

Marx, M. H., & Hillix, W. A. (1963). Systems and theories in psychology. McGraw-Hill.

Cita Chicago Style (17a ed.)

Marx, Melvin Herman, y William A. Hillix. Systems and Theories in Psychology. New York [etc.]: McGraw-Hill, 1963.

Cita MLA (9a ed.)

Marx, Melvin Herman, y William A. Hillix. Systems and Theories in Psychology. McGraw-Hill, 1963.