Al shahrani, S. A., F. A. F. Abdul Hamid, and A. Binti Ali. “The Regime of Governance and Administration in The Saudi State and The Participation of The Shahran Tribe”. Al-Muqaddimah: Online Journal of Islamic History and Civilization, vol. 5, no. 1, May 2017, pp. 172-95, http://adum.um.edu.my/index.php/MUQADDIMAH/article/view/11129.