Cita APA

Charters, W. W., Smiley, D. F., & Strang, R. M. (1935). Keeping healthy. Macmillan.

Chicago Style (17th ed.) Citation

Charters, W. W., Dean Franklin Smiley, i Ruth May Strang. Keeping Healthy. New York: Macmillan, 1935.

Cita MLA

Charters, W. W., et al. Keeping Healthy. Macmillan, 1935.