Intan, Salmah. “KEKHALIFAAN UMAR IBN KHATTAB (13-23 H/ 634-644 M)”. Rihlah: Jurnal Sejarah dan Kebudayaan 5, no. 2 (January 22, 2018): 137-150. Accessed November 21, 2024. https://journal3.uin-alauddin.ac.id/index.php/rihlah/article/view/4167.