APA (7th ed.) Citation

Peyrefitte, R. (1957). The keys of St. Peter, a novel. Criterion Books.

Chicago Style (17th ed.) Citation

Peyrefitte, Roger. The Keys of St. Peter, a Novel. New York: Criterion Books, 1957.

MLA (9th ed.) Citation

Peyrefitte, Roger. The Keys of St. Peter, a Novel. Criterion Books, 1957.