APA (7th ed.) Citation

Piault, B. (1959). What is the Trinity? Hawthorn Books, Publishers.

Chicago Style (17th ed.) Citation

Piault, Bernard. What Is the Trinity? New York: Hawthorn Books, Publishers, 1959.

MLA (9th ed.) Citation

Piault, Bernard. What Is the Trinity? Hawthorn Books, Publishers, 1959.

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