Rudolph, N. (1974). Workyards: Playgrounds planned for adventure. Teachers College Press.
Lua i Stíl Chicago (17ú heag.)Rudolph, Nancy. Workyards: Playgrounds Planned for Adventure. New York: Teachers College Press, 1974.
Lua MLA (8ú heag.)Rudolph, Nancy. Workyards: Playgrounds Planned for Adventure. Teachers College Press, 1974.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.