APA (7th ed.) Citation

Knight, J. W., & Callahan, J. C. (1989). Preventing birth: Contemporary methods and related moral controversies. Ethics in a changing world.

Chicago Style (17th ed.) Citation

Knight, James W., and Joan C. Callahan. "Preventing Birth: Contemporary Methods and Related Moral Controversies." Ethics in a Changing World 1989.

MLA (9th ed.) Citation

Knight, James W., and Joan C. Callahan. "Preventing Birth: Contemporary Methods and Related Moral Controversies." Ethics in a Changing World, 1989.