Engku Alawi, E. A. Z. “Al-Mu‘tazilah Wa Musāhamātihim Fī Al-Fikr Al-Islāmī”. Jurnal Usuluddin, vol. 18, Dec. 2003, pp. 211-26, https://ejournal.um.edu.my/index.php/JUD/article/view/4098.