Cita APA (7a ed.)

Willis, J. D., & Campbell, L. F. (1992). Exercise psychology. Human Kinetics.

Cita Chicago Style (17a ed.)

Willis, Joe Don, y Linda Frye Campbell. Exercise Psychology. Champaign, Illinois: Human Kinetics, 1992.

Cita MLA (9a ed.)

Willis, Joe Don, y Linda Frye Campbell. Exercise Psychology. Human Kinetics, 1992.