Was heisst Fortschritt?
MLA
Metzger, Heinz-Klaus. Was Heisst Fortschritt?. Munich: Edidtion text + kritik, 1998.
APA
Metzger, H. (1998). Was heisst Fortschritt?. Munich: Edidtion text + kritik.
Chicago
Metzger, Heinz-Klaus, and Rainer Riehn. Was Heisst Fortschritt?. Munich: Edidtion text + kritik, 1998.