Mujahid, Muhammad Aslam. “Helga Lili Wolff’s Study of Religions, Conversion to Islam, Qur’anic Authorship and Da’wah Services”. Journal of World Religions and Interfaith Harmony 1, no. 1 (December 27, 2022): 18–26. Accessed May 16, 2024. https://journals.iub.edu.pk/index.php/jwrih/article/view/1614.