Suwandi Simangunsong, and Mohd Syakir Mohd Rosdi. “ANALISIS KEJAYAAN PEMERINTAHAN ISLAM BERASASKAN PELAKSANAAN KONSEP KAEDAH KEPEMIMPINAN BERTERASKAN ISLAM UMAR AL-KHATTAB RA DALAM MEYAKINKAN ORANG BUKAN ISLAM”. Journal of Islamic, Social, Economics and Development 9, no. 63 (June 30, 2024). Accessed April 10, 2025. https://academicinspired.com/jised/article/view/2015.