APA-referens (7:e uppl.)

Coppa, F. J. (2008). Politics and the papacy in the modern world. Praeger.

Chicago-referens (17:e uppl.)

Coppa, Frank J. Politics and the Papacy in the Modern World. Westport, Conn.: Praeger, 2008.

MLA-referens (9:e uppl.)

Coppa, Frank J. Politics and the Papacy in the Modern World. Praeger, 2008.