Eisner, P. (2013). The Pope's last crusade: How an American Jesuit helped Pope Pius XI's campaign to stop Hitler. William Morrow.
Citazione stile Chigago Style (17a edizione)Eisner, Peter. The Pope's Last Crusade: How an American Jesuit Helped Pope Pius XI's Campaign to Stop Hitler. New York, NY: William Morrow, 2013.
Citatione MLA (8a ed.)Eisner, Peter. The Pope's Last Crusade: How an American Jesuit Helped Pope Pius XI's Campaign to Stop Hitler. William Morrow, 2013.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.