APA (7th ed.) Citation

Hayward, F., & Butler, C. (1931). A History of the Popes. J. M. Dent.

Chicago Style (17th ed.) Citation

Hayward, Fernand, and Cuthbert Butler. A History of the Popes. London: J. M. Dent, 1931.

MLA (9th ed.) Citation

Hayward, Fernand, and Cuthbert Butler. A History of the Popes. J. M. Dent, 1931.

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