Cita APA (7a ed.)

Bruehl, C. P., & Campbell, W. E. (1957). Psychology: The study of man's normal mental life. Villanova Press.

Cita Chicago Style (17a ed.)

Bruehl, Charles Paul, y William Edward Campbell. Psychology: The Study of Man's Normal Mental Life. Villanova, Pa: Villanova Press, 1957.

Cita MLA (9a ed.)

Bruehl, Charles Paul, y William Edward Campbell. Psychology: The Study of Man's Normal Mental Life. Villanova Press, 1957.