APA (7th ed.) Citation

Alberger, J. (2011). Monks, Popes, and their Political Intrigues. Project Gutenberg.

Chicago Style (17th ed.) Citation

Alberger, John. Monks, Popes, and Their Political Intrigues. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Alberger, John. Monks, Popes, and Their Political Intrigues. Project Gutenberg, 2011.

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