APA (7th ed.) Citation

(2007). Who speaks for Islam?: What a billion muslims really think. Gallup Press.

Chicago Style (17th ed.) Citation

Who Speaks for Islam?: What a Billion Muslims Really Think. New York: Gallup Press, 2007.

MLA (8th ed.) Citation

Who Speaks for Islam?: What a Billion Muslims Really Think. Gallup Press, 2007.

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