Hapkemeyer, A. On the principle of dialog in Jochen Gerz's works for public spaces: Andreas Hapkemeyer. Jochen Gerz - Res publica : the public work 1968 - 1999.(1999).
Chicago-referens (17:e uppl.)Hapkemeyer, Andreas. "On the Principle of Dialog in Jochen Gerz's Works for Public Spaces: Andreas Hapkemeyer." Jochen Gerz - Res Publica : The Public Work 1968 - 1999.(1999) .
MLA-referens (8:e uppl.)Hapkemeyer, Andreas. "On the Principle of Dialog in Jochen Gerz's Works for Public Spaces: Andreas Hapkemeyer." Jochen Gerz - Res Publica : The Public Work 1968 - 1999.(1999), .
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.