Lua APA (7ú heag.)
Coppa, F. J. (2008). Politics and the papacy in the modern world. Praeger.
Lua i Stíl Chicago (17ú heag.)
Coppa, Frank J. Politics and the Papacy in the Modern World. Westport, Conn.: Praeger, 2008.
Lua MLA (9ú heag.)
Coppa, Frank J. Politics and the Papacy in the Modern World. Praeger, 2008.
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