Al Zaylai، A. u.، و Gazzard، R. J. A. (1983). The Southern Area of the Amirate of Makkah " 3rd - 7th / 9th - 13th Centuries " , its History, Archaeology and Epigraphy (رسالة دكتوراه غير منشورة). Durham University، درم. مسترجع من http://search.mandumah.com/Record/603040
Al Zaylai، Ahmed umar، و R. J. A. Gazzard. "The Southern Area of the Amirate of Makkah " 3rd - 7th / 9th - 13th Centuries " , Its History, Archaeology and Epigraphy" رسالة دكتوراه. Durham University، درم، 1983. مسترجع من http://search.mandumah.com/Record/603040