Cita APA (7a ed.)

Willis, R. J. B., Baildam, E., & Marshall, D. (2001). How to stay healthy. The Stanborough Press.

Cita Chicago Style (17a ed.)

Willis, Richard J. B., Eileen Baildam, y David Marshall. How to Stay Healthy. Grantham: The Stanborough Press, 2001.

Cita MLA (9a ed.)

Willis, Richard J. B., et al. How to Stay Healthy. The Stanborough Press, 2001.