APA (7th ed.) Citation

Gibbon, E. (1991). On Christianity. Prometheus Books.

Chicago Style (17th ed.) Citation

Gibbon, Edward. On Christianity. Buffalo, New York: Prometheus Books, 1991.

MLA (9th ed.) Citation

Gibbon, Edward. On Christianity. Prometheus Books, 1991.

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