“The Dynamics Of Islamic Civilization During The Appointment Process Of Caliph Umar Bin Khattab”. Luxfia: Journal of Multidisciplinary Research 1, no. 01 (May 24, 2026): 137–147. Accessed May 25, 2026. https://www.risetcendikia.com/index.php/journal-luxfia/article/view/311.