Dhafar، T. O.، و Hatfield، R. (1986). A Survey of the English Language Supervisors' and Teachers' Perceptions of the English Language Curriculum in the Secondary Schools of Saudi Arabia (رسالة دكتوراه غير منشورة). Michigan State University، إيست لانسنيغ. مسترجع من http://search.mandumah.com/Record/616494
Dhafar، Talal Obaid، و Robert Hatfield. "A Survey of the English Language Supervisors' and Teachers' Perceptions of the English Language Curriculum in the Secondary Schools of Saudi Arabia" رسالة دكتوراه. Michigan State University، إيست لانسنيغ، 1986. مسترجع من http://search.mandumah.com/Record/616494