Bollnow, O. (2011). Human space. Hyphen Press.
Lua i Stíl Chicago (17ú heag.)Bollnow, O.F. Human Space. Hyphen Press, 2011.
Lua MLA (8ú heag.)Bollnow, O.F. Human Space. Hyphen Press, 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.