Tisdall, C. (1979). Joseph Beuys: Caroline Tisdall. Thames & Hudson [u.a.].
Lua i Stíl Chicago (17ú heag.)Tisdall, Caroline. Joseph Beuys: Caroline Tisdall. London: Thames & Hudson [u.a.], 1979.
Lua MLA (8ú heag.)Tisdall, Caroline. Joseph Beuys: Caroline Tisdall. Thames & Hudson [u.a.], 1979.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.