Usman, Muhammad Abduh. “The Tribal System in Yemen And the Position of Islamic Law on It”. Al-Muqaddimah: Online Journal of Islamic History and Civilization 7, no. 2 (June 12, 2020): 53–65. Accessed May 7, 2024. https://ejournal.um.edu.my/index.php/MUQADDIMAH/article/view/24313.