APA
Friedberg M. P., . (1975). Do it Yourself Playgrounds. : Architectural Press.
Chicago
Friedberg M Paul, . 1975. Do it Yourself Playgrounds. : Architectural Press.
Harvard
Friedberg M. P., . (1975). Do it Yourself Playgrounds. : Architectural Press.
MLA
Friedberg M Paul, . Do it Yourself Playgrounds. : Architectural Press. 1975.
