APA (7th ed.) Citation

Chadwick, O. (1998). A history of the popes: 1830-1914. Clarendon Press.

Chicago Style (17th ed.) Citation

Chadwick, Owen. A History of the Popes: 1830-1914. Oxford: Clarendon Press, 1998.

MLA (9th ed.) Citation

Chadwick, Owen. A History of the Popes: 1830-1914. Clarendon Press, 1998.

Warning: These citations may not always be 100% accurate.