Ray, G. (2001). Joseph Beuys: Mapping the Legacy / Edited by Gene Ray. Essays by Lukas Beckmann. D.A.P. [u.a.].
Chicago-referens (17:e uppl.)Ray, Gene. Joseph Beuys: Mapping the Legacy / Edited by Gene Ray. Essays by Lukas Beckmann. New York: D.A.P. [u.a.], 2001.
MLA-referens (8:e uppl.)Ray, Gene. Joseph Beuys: Mapping the Legacy / Edited by Gene Ray. Essays by Lukas Beckmann. D.A.P. [u.a.], 2001.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.