APA (7th ed.) Citation

Spencer, R. (2007). Religion of peace?: Why Christianity is and Islam isn't. Regnery Publ.

Chicago Style (17th ed.) Citation

Spencer, Robert. Religion of Peace?: Why Christianity Is and Islam Isn't. Washington, D.C: Regnery Publ, 2007.

MLA (8th ed.) Citation

Spencer, Robert. Religion of Peace?: Why Christianity Is and Islam Isn't. Regnery Publ, 2007.