APA (7th ed.) Citation

O'Neil, R., & Donovan, M. (1966). Psychological development and the concept of mortal sin. Franciscan Herald Press.

Chicago Style (17th ed.) Citation

O'Neil, Robert, and Michael Donovan. Psychological Development and the Concept of Mortal Sin. Chicago, Ill: Franciscan Herald Press, 1966.

MLA (8th ed.) Citation

O'Neil, Robert, and Michael Donovan. Psychological Development and the Concept of Mortal Sin. Franciscan Herald Press, 1966.

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