Mitchell, E. D., Mason, B. S., & Bowen, W. P. 1. . T. t. o. o. p. (1934). The theory of play. A.S. Barnes and company, incorporated.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMitchell, Elmer Dayton, Bernard Sterling Mason, और Wilbur Pardon 1864-1928. The theory of organized play Bowen. The Theory of Play. New York: A.S. Barnes and company, incorporated, 1934.
एमएलए (9वां संस्करण) प्रशस्ति पत्रMitchell, Elmer Dayton, et al. The Theory of Play. A.S. Barnes and company, incorporated, 1934.
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