bin Hussain, R., and A. Nasirudeen. “The Reality of Controversial Terms and Terms Between Sunnis and Shiites An Analytical Study from a Linguistic Historical Perspective”. AL-Lisan International Journal for Linguistic & Literary Studies, Vol. 4, no. 9, Jan. 2021, pp. 58-76, http://ojs.mediu.edu.my/index.php/AIJLLS/article/view/3261.