APA (7th ed.) Citation

Guerry, E. (1964). The popes and world government. Helicon.

Chicago Style (17th ed.) Citation

Guerry, Emile. The Popes and World Government. Baltimore: Helicon, 1964.

MLA (9th ed.) Citation

Guerry, Emile. The Popes and World Government. Helicon, 1964.

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