Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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