APA (7th ed.) Citation

Girgis, S., Anderson, R. T., & George, R. P. (2012). What is marriage?: Man and woman : a defense. Encounter Books.

Chicago Style (17th ed.) Citation

Girgis, Sherif, Ryan T. Anderson, and Robert P. George. What Is Marriage?: Man and Woman : A Defense. New York: Encounter Books, 2012.

MLA (9th ed.) Citation

Girgis, Sherif, et al. What Is Marriage?: Man and Woman : A Defense. Encounter Books, 2012.