Lipgens, W. (1985). Documents on the History of European Integrations: Continental plans for European Union 1939 - 1945. DeGruyter.
Lua i Stíl Chicago (17ú heag.)Lipgens, Walter. Documents on the History of European Integrations: Continental Plans for European Union 1939 - 1945. Berlin; New York: DeGruyter, 1985.
Lua MLA (8ú heag.)Lipgens, Walter. Documents on the History of European Integrations: Continental Plans for European Union 1939 - 1945. DeGruyter, 1985.
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