APA (7th ed.) Citation

Esposito, J. L. (2008). Who speaks for islam?: What a billion muslims really think. Gallup Press.

Chicago Style (17th ed.) Citation

Esposito, John L. Who Speaks for Islam?: What a Billion Muslims Really Think. New York, NY: Gallup Press, 2008.

MLA (9th ed.) Citation

Esposito, John L. Who Speaks for Islam?: What a Billion Muslims Really Think. Gallup Press, 2008.