Citazione APA

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

Stile di citazione Chicago

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

Citazione MLA

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