Style de citation APA (7e éd.)

Johnson, H. J. T. (1933). Vatican diplomacy in the world war. B. Blackwell.

Style de citation Chicago (17e éd.)

Johnson, Humphrey J. T. Vatican Diplomacy in the World War. Oxford: B. Blackwell, 1933.

Style de citation MLA (8e éd.)

Johnson, Humphrey J. T. Vatican Diplomacy in the World War. B. Blackwell, 1933.