APA Citation

Butler, G. D. (1960). Playgrounds: Their Administration and Operation. New York: Ronald Press Co..

Trích dẫn kiểu Chicago

Butler, George D. Playgrounds: Their Administration and Operation. New York: Ronald Press Co., 1960.

MLA Citation

Butler, George D. Playgrounds: Their Administration and Operation. New York: Ronald Press Co., 1960.

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