Nur Aflaha A. Manajemen Krisis Ramadah Umar bin Khattab Perspektif Sejarah Ekonomi Islam. Rihlah [Internet]. 2019 Jun. 6 [cited 2025 Jun. 9];7(1):1-12. Available from: https://journal.uin-alauddin.ac.id/index.php/rihlah/article/view/9371