Celant, G. (1981). On the following pages is a project by A. R. Penck. Artforum.
Lua i Stíl Chicago (17ú heag.)Celant, Germano. "On the Following Pages Is a Project by A. R. Penck." Artforum 1981.
Lua MLA (8ú heag.)Celant, Germano. "On the Following Pages Is a Project by A. R. Penck." Artforum, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.