Willoughby, W. F. (1936). The government of modern states. D. Appleton-Century company, incorporated.
Lua i Stíl Chicago (17ú heag.)Willoughby, William Franklin. The Government of Modern States. New York, London: D. Appleton-Century company, incorporated, 1936.
Lua MLA (9ú heag.)Willoughby, William Franklin. The Government of Modern States. D. Appleton-Century company, incorporated, 1936.
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