Saad Jaffar, and Dr. Nasir Ali khan. “Da’wah in the Early Era of Islam: A Review of the Prophet’s Da’wah Strategies”. Iḥyāʾ Alʿ ulūm - Journal of Department of Quran O Sunnah, vol. 21, no. 2, Dec. 2021, doi:10.46568/ihya.v21i2.120.