Johnson, H. J. T. (1933). Vatican diplomacy in the world war. B. Blackwell.
Lua i Stíl Chicago (17ú heag.)Johnson, Humphrey J. T. Vatican Diplomacy in the World War. Oxford: B. Blackwell, 1933.
Lua MLA (8ú heag.)Johnson, Humphrey J. T. Vatican Diplomacy in the World War. B. Blackwell, 1933.
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