Cita APA (7a ed.)

Warren, R. M., & Warren, R. P. (1968). Helmholtz on perception: Its physiology and development. Wiley & Sons.

Cita Chicago Style (17a ed.)

Warren, Richard M., y Roslyn P. Warren. Helmholtz on Perception: Its Physiology and Development. New York [etc.]: Wiley & Sons, 1968.

Cita MLA (9a ed.)

Warren, Richard M., y Roslyn P. Warren. Helmholtz on Perception: Its Physiology and Development. Wiley & Sons, 1968.