Citazione APA

Charters, W. W., Smiley, D. F., Strang, R. M., & Seredy, K. (1937). Happy days. The Macmillan Company.

Stile di citazione Chicago

Charters, W. W., Dean Franklin Smiley, Ruth May Strang, e Kate Seredy. Happy Days. New York: The Macmillan Company, 1937.

Citazione MLA

Charters, W. W., et al. Happy Days. The Macmillan Company, 1937.