Bengtsson, A. (1972). Adventure playgrounds. Crosby Lockwood Staples.
Lua i Stíl Chicago (17ú heag.)Bengtsson, Arvid. Adventure Playgrounds. London: Crosby Lockwood Staples, 1972.
Lua MLA (8ú heag.)Bengtsson, Arvid. Adventure Playgrounds. Crosby Lockwood Staples, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.