Cita APA (7a ed.)

Girgis, S., Anderson, R. T., & George, R. P. (2012). What is marriage?: Man and woman : a defense (1st American ed.). Encounter Books.

Cita Chicago Style (17a ed.)

Girgis, Sherif, Ryan T. Anderson, y Robert P. George. What Is Marriage?: Man and Woman : A Defense. 1st American ed. New York: Encounter Books, 2012.

Cita MLA (9a ed.)

Girgis, Sherif, et al. What Is Marriage?: Man and Woman : A Defense. 1st American ed. Encounter Books, 2012.