Khamidiyah, Lailun Nurul, Ahmad Syafi’i SJ, and Diyan Putri Ayu. “Kebijakan Ekonomi Khalifah Umar Ibn Khatab”. Indonesian Journal of Islamic Economics and Finance 1, no. 1 (August 9, 2021): 15–36. Accessed September 26, 2025. https://ejournal.insuriponorogo.ac.id/index.php/jief/article/view/878.