Cita APA (7a ed.)

Butler, G. D. (1936). Playgrounds, their administration and operation: National recreation association. A.S. Barnes.

Cita Chicago Style (17a ed.)

Butler, George D. Playgrounds, Their Administration and Operation: National Recreation Association. New York: A.S. Barnes, 1936.

Cita MLA (8a ed.)

Butler, George D. Playgrounds, Their Administration and Operation: National Recreation Association. A.S. Barnes, 1936.