Al Thenayian، M. A. R. (1993). An Archaeological Study of the Yemeni Highland Pilgrim Route between Sana and Mecca (رسالة دكتوراه غير منشورة). Durham University، درم. مسترجع من http://search.mandumah.com/Record/603025
Al Thenayian، Mohammed Al Rashed. "An Archaeological Study of the Yemeni Highland Pilgrim Route between Sana and Mecca" رسالة دكتوراه. Durham University، درم، 1993. مسترجع من http://search.mandumah.com/Record/603025