ال الشيخ، عصام محمد عبدالله حسن. (1995). An Analysis of the Difficulties Involved in Introducing Western Programmes for the Training of Health Care Professionals Into the Kingdom of Saudi Arabia (رسالة دكتوراه غير منشورة). University of Wales، كارديف. مسترجع من http://search.mandumah.com/Record/609844
ال الشيخ، عصام محمد عبدالله حسن. "An Analysis of the Difficulties Involved in Introducing Western Programmes for the Training of Health Care Professionals Into the Kingdom of Saudi Arabia" رسالة دكتوراه. University of Wales، كارديف، 1995. مسترجع من http://search.mandumah.com/Record/609844