Abdul Hamid, H., & Abdul Hamid, F. @ A. F. (2018). Development of Zakat Administration during Caliph Umar al-Khattab. Al-Muqaddimah: Online Journal of Islamic History and Civilization, 6(2), 1–14. Retrieved from https://ejournal.um.edu.my/index.php/MUQADDIMAH/article/view/15547