Aziz, T., and D. M. S. Manj. “Polemical Writings on the Sources of Sirah in the West: A Critical Evaluation of Robert Spencer’s Book Did Muhammad Exist.?”. Rahat-Ul-Quloob, Vol. 3, no. 2(2), Dec. 2019, pp. 21-30, doi:10.51411/rahat.3.2(2).2019.225.