APA-referens

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

Chicago-stil citat

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

MLA-referens

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

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.