(en) Mahmood Ibrahim, « Social and Economic Conditions In Per-Islamic Mecca », International Journal of Middle East Studies, (DOI10.1017/S0020743800051977)
(en) Muhammad Yasin Mazhar Siddiqi, The Prophet Muhammad : A Role Model for Muslim Minorities, Kube Publishing Ltd, , 248 p. (ISBN978-0-86037-677-4, lire en ligne)