APA (7th ed.) Citation

Paul VI, P. (1968). Humanae Vitae: Pope Paul's encyclical on birth control. New Haven, Conn..

Chicago Style (17th ed.) Citation

Paul VI, Pope. Humanae Vitae: Pope Paul's Encyclical on Birth Control. New Haven, Conn., 1968.

MLA (8th ed.) Citation

Paul VI, Pope. Humanae Vitae: Pope Paul's Encyclical on Birth Control. New Haven, Conn., 1968.

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