Haddadin، A. B. H.، Dweik، B. S.، و Sheir، A. A. (2006). A Remedial Programme for Developing the English Language Skills in the Light of the Washback Effect of Public Examinations on the Instruction of the Secondary Stage in Jordan (رسالة دكتوراه غير منشورة). جامعة عمان العربية، عمان. مسترجع من http://search.mandumah.com/Record/635169
Haddadin، Ahed Bajis Hanna، Bader Saed Dweik، و Awatef Ali Sheir. "A Remedial Programme for Developing the English Language Skills in the Light of the Washback Effect of Public Examinations On the Instruction of the Secondary Stage in Jordan" رسالة دكتوراه. جامعة عمان العربية، عمان، 2006. مسترجع من http://search.mandumah.com/Record/635169