Wadood, D. ., and D. K. . Rehman. “التدرج في دعوة النبي صلى الله عليه وسلم باعتبار الوسيلة: Gradation in the Using of Resources Used by Muhammad(peace and Blessings of Allah Be Upon Him) for the Calling of People to Islam”. Acta-Islamica, vol. 11, no. 02, Dec. 2022, pp. 80-88, http://aisbbu.com/index.php/ai/article/view/234.