1.
Rizkia TP, Hardiyansyah MR. Masa Kepemimpinan Khalifah Umar Bin Khattab. Hijaz [Internet]. 2023 Jan. 28 [cited 2025 Feb. 17];2(2):88-94. Available from: https://jurnal.medanresourcecenter.org/index.php/HIJ/article/view/811