Gaya APA

Eisner, P. (2013). The Pope's Last Crusade: How an American Jesuit helped Pope Pius XI's campaign to stop Hitler. . New York: William Morrow..

Gaya MLA

Eisner, Peter. "The Pope's Last Crusade: How an American Jesuit helped Pope Pius XI's campaign to stop Hitler.". New York: William Morrow., 2013. Buku.