APA-referens (7:e uppl.)
Coppa, F. J. (1999). Controversial concordats: The Vatican's relations with Napoleon, Mussolini, and Hitler. Catholic University of America Press.
Chicago-referens (17:e uppl.)
Coppa, Frank J. Controversial Concordats: The Vatican's Relations with Napoleon, Mussolini, and Hitler. Washington, District of Columbia: Catholic University of America Press, 1999.
MLA-referens (9:e uppl.)
Coppa, Frank J. Controversial Concordats: The Vatican's Relations with Napoleon, Mussolini, and Hitler. Catholic University of America Press, 1999.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.