Cita APA

DONNELLY, R. J., HELMS, W. G., & MITCHELL, E. D. (1958). Active games and contests.-- 2nd ed. The Ronald Press.

Citación estilo Chicago

DONNELLY, Richard J., William G. HELMS, and Elmer D. MITCHELL. Active Games and Contests.-- 2nd Ed. New York: The Ronald Press, 1958.

Cita MLA

DONNELLY, Richard J., et al. Active Games and Contests.-- 2nd Ed. The Ronald Press, 1958.