APA (7th ed.) Citation

Blet, P. (1999). Pius XII and the Second World War: According to the Archives of the Vatican. Paulist Press.

Chicago Style (17th ed.) Citation

Blet, Pierre. Pius XII and the Second World War: According to the Archives of the Vatican. New York: Paulist Press, 1999.

MLA (8th ed.) Citation

Blet, Pierre. Pius XII and the Second World War: According to the Archives of the Vatican. Paulist Press, 1999.

Warning: These citations may not always be 100% accurate.