Rudolph, N. (1974). Workyards: Playgrounds planned for adventure. Teachers College Press.
Chicago-referens (17:e uppl.)Rudolph, Nancy. Workyards: Playgrounds Planned for Adventure. New York: Teachers College Press, 1974.
MLA-referens (8:e uppl.)Rudolph, Nancy. Workyards: Playgrounds Planned for Adventure. Teachers College Press, 1974.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.