APA (7e ed.) Bronvermelding
Spencer, R., & Jansen, J. J. G. (2012). Did Muhammad exist?: An inquiry into Islam's obscure origins. ISI Books.
Chicago (17e ed.) Bronvermelding
Spencer, Robert, en Johannes J. G. Jansen. Did Muhammad Exist?: An Inquiry into Islam's Obscure Origins. Wilmington, Delaware: ISI Books, 2012.
MLA (9e ed.) Bronvermelding
Spencer, Robert, en Johannes J. G. Jansen. Did Muhammad Exist?: An Inquiry into Islam's Obscure Origins. ISI Books, 2012.
Let op: Deze citaties zijn niet altijd 100% accuraat.