Abu al-Fath al-Shahrastani
محمد بن عبد الكريم الشهرستاني أبو الفتح الشافعي
4 References
Al-Milal wa al-Nihal
المِلَل والنِّحل
Cairo: al-Halabi, 1968London: Kegan Paul (as "Muslim Sects and Divisions", translated by Kazi and Flynn), 1984 CE