Coppa. The Life and Pontificate of Pope Pius Xii. The Catholic University of America Press.
Chicago-viite (17. p.)Coppa. The Life and Pontificate of Pope Pius Xii. The Catholic University of America Press.
MLA-viite (8. p.)Coppa. The Life and Pontificate of Pope Pius Xii. The Catholic University of America Press.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.