Frankel, D. (1999). Gerhard Richter. Artforum.
Lua i Stíl Chicago (17ú heag.)Frankel, David. "Gerhard Richter." Artforum 1999.
Lua MLA (8ú heag.)Frankel, David. "Gerhard Richter." Artforum, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.