Rothfuss, J. Joseph Beuys: Echoes in America. Joseph Beuys : Mapping the Legacy.
Lua i Stíl Chicago (17ú heag.)Rothfuss, Joan. "Joseph Beuys: Echoes in America." Joseph Beuys : Mapping the Legacy .
Lua MLA (8ú heag.)Rothfuss, Joan. "Joseph Beuys: Echoes in America." Joseph Beuys : Mapping the Legacy, .
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.