APA (7th ed.) Citation

Civis romanus. (1929). The Pope is king. G.P. Putnam's Sons.

Chicago Style (17th ed.) Citation

Civis romanus. The Pope Is King. New York: G.P. Putnam's Sons, 1929.

MLA (9th ed.) Citation

Civis romanus. The Pope Is King. G.P. Putnam's Sons, 1929.