APA (7th ed.) Citation

Hardon, J. A. (1975). The Catholic catechism. Doubleday.

Chicago Style (17th ed.) Citation

Hardon, John A. The Catholic Catechism. Garden City, N.Y.: Doubleday, 1975.

MLA (8th ed.) Citation

Hardon, John A. The Catholic Catechism. Doubleday, 1975.