Weigert, H. W. (1942). German geopolitics. London: Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Weigert, Hans Werner. German Geopolitics. London: Oxford University Press, 1942.
Lua MLA (8ú heag.)Weigert, Hans Werner. German Geopolitics. London: Oxford University Press, 1942.
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