Al Mahmoud، F. I. M.، و Aqel، F. (2000). Levels of burnout among the teatchers of english as a foreign language in the northern governorates of palestine and their relationship with some demographic variables (رسالة ماجستير غير منشورة). جامعة النجاح الوطنية، نابلس. مسترجع من http://search.mandumah.com/Record/584048
Al Mahmoud، Firas Ibrahim Mahmoud، و Fawaz Aqel. "Levels of Burnout Among the Teatchers of English As a Foreign Language in the Northern Governorates of Palestine and Their Relationship With Some Demographic Variables" رسالة ماجستير. جامعة النجاح الوطنية، نابلس، 2000. مسترجع من http://search.mandumah.com/Record/584048