Rugoff, R. (2009). Johannes Kahrs: With an essay by Ralph Rugoff. Hatje Cantz Verlag.
Chicago-Zitierstil (17. Ausg.)Rugoff, Ralph. Johannes Kahrs: With an Essay by Ralph Rugoff. Ostfildern: Hatje Cantz Verlag, 2009.
MLA-Zitierstil (8. Ausg.)Rugoff, Ralph. Johannes Kahrs: With an Essay by Ralph Rugoff. Hatje Cantz Verlag, 2009.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.