Al Hareky، S. M.، و Welliver، P. W. (1983). A Study of the Effectiveness of Modern Educational Technology on the Mathematics Performance of Elementary Students in Saudi Arabia (رسالة دكتوراه غير منشورة). Pennsylvania State University، بنسلفانيا. مسترجع من http://search.mandumah.com/Record/612100
Al Hareky، Saad M.، و Paul W. Welliver. "A Study of the Effectiveness of Modern Educational Technology On the Mathematics Performance of Elementary Students in Saudi Arabia" رسالة دكتوراه. Pennsylvania State University، بنسلفانيا، 1983. مسترجع من http://search.mandumah.com/Record/612100