KHAMIDIYAH, L. N.; SYAFI’I SJ, A.; AYU, D. P. Kebijakan Ekonomi Khalifah Umar Ibn Khatab. Indonesian Journal of Islamic Economics and Finance, [S. l.], v. 1, n. 1, p. 15–36, 2021. DOI: 10.37680/ijief.v1i1.878. Disponível em: https://ejournal.insuriponorogo.ac.id/index.php/jief/article/view/878. Acesso em: 26 sep. 2025.