Nurkholijah Siregar, Ahmad Sukri Harahap. KEPEMIMPINAN MASA KHULAFA AR-RASYIDIN ABU BAKAR AS-SHIDDIQ DAN UMAR BIN KHATTAB. Ar-raudah [Internet]. 2025Feb.8 [cited 2026Apr.8];1(4):1-12. Available from: https://www.ojs.staira.ac.id/index.php/raudah/article/view/566