National Recreation Association & Butler, G. D. (1936). Playgrounds, their administration and operation. A. S. Barnes and company, incorporated.
Chicago Style (17th ed.) CitationNational Recreation Association and George D. Butler. Playgrounds, Their Administration and Operation. New York: A. S. Barnes and company, incorporated, 1936.
MLA (9th ed.) CitationNational Recreation Association and George D. Butler. Playgrounds, Their Administration and Operation. A. S. Barnes and company, incorporated, 1936.
Warning: These citations may not always be 100% accurate.