Schubel, V. J. (2011). Muhammad and the Believers at the Origins of Islam. International Institute of Islamic Thought.
Chicago Style (17th ed.) CitationSchubel, Vernon James. Muhammad and the Believers at the Origins of Islam. International Institute of Islamic Thought, 2011.
MLA (8th ed.) CitationSchubel, Vernon James. Muhammad and the Believers at the Origins of Islam. International Institute of Islamic Thought, 2011.
Warning: These citations may not always be 100% accurate.