Lipgens, W. (1985). Documents on the History of European Integrations: Continental plans for European Union 1939 - 1945. DeGruyter.
Chicago-referens (17:e uppl.)Lipgens, Walter. Documents on the History of European Integrations: Continental Plans for European Union 1939 - 1945. Berlin; New York: DeGruyter, 1985.
MLA-referens (8:e uppl.)Lipgens, Walter. Documents on the History of European Integrations: Continental Plans for European Union 1939 - 1945. DeGruyter, 1985.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.