APA Edition Citation

Marx, M. H. A., & Hillix, W. A. (1963). System and theories is psychology.

Chicago Edition Citation

Marx, Melvin H. And, and William A. Hillix. System and Theories Is Psychology. 1963.

MLA Edition Citation

Marx, Melvin H. And, and William A. Hillix. System and Theories Is Psychology. 1963.

Warning: These citations may not always be 100% accurate.