APA (7th ed.) Citation

O'Brien, J. A. (1971). Happy marriage: Guidance for courtship and after ([3rd edition].). St. Paul Pub.

Chicago Style (17th ed.) Citation

O'Brien, John A. Happy Marriage: Guidance for Courtship and After. [3rd edition]. Makati, Rizal: St. Paul Pub, 1971.

MLA (9th ed.) Citation

O'Brien, John A. Happy Marriage: Guidance for Courtship and After. [3rd edition]. St. Paul Pub, 1971.