Al Sudais، O. A.، و Holme، R. (2004). The Perceptions of Specific Needs Among A Discourse Community of ESP Learners: Whether these Relate to their Achievement , Attitudes and Motivation (رسالة دكتوراه غير منشورة). Durham University، درم. مسترجع من http://search.mandumah.com/Record/608704
Al Sudais، Omar A.، و Rوal Holme. "The Perceptions of Specific Needs Among A Discourse Community of ESP Learners: Whether These Relate to Their Achievement , Attitudes and Motivation" رسالة دكتوراه. Durham University، درم، 2004. مسترجع من http://search.mandumah.com/Record/608704