Παραπομπή APA

Droege, G. (1972). German Economic and Social History. Verlag Ullstein.

Παραπομπή Chicago Style

Droege, Georg. German Economic and Social History. Frankfurt: Verlag Ullstein, 1972.

Παραπομπή MLA

Droege, Georg. German Economic and Social History. Verlag Ullstein, 1972.