APA (7th ed.) Citation

Douillet, J., & Attwater, D. (1963). What is a saint? Deus Books.

Chicago Style (17th ed.) Citation

Douillet, Jacques, and Donald Attwater. What Is a Saint? New York: Deus Books, 1963.

MLA (8th ed.) Citation

Douillet, Jacques, and Donald Attwater. What Is a Saint? Deus Books, 1963.