APA (7e ed.) Bronvermelding

Friedberg, M. P. (1976). Do it yourself playgrounds. Architectural Press.

Chicago (17e ed.) Bronvermelding

Friedberg, M. Paul. Do It Yourself Playgrounds. London: Architectural Press, 1976.

MLA (8e ed.) Bronvermelding

Friedberg, M. Paul. Do It Yourself Playgrounds. Architectural Press, 1976.