Al Headar، A.، و Abegglen، S. (2012). Possible Learning Difficulties of Children with Speech and Language Disorder (SpLD) in the Allegam School, Najran, Saudi Arabia (رسالة ماجستير غير منشورة). London Metropolitan University، لندن. مسترجع من http://search.mandumah.com/Record/612423
Al Headar، Amani، و Sوra Abegglen. "Possible Learning Difficulties of Children With Speech and Language Disorder (SpLD) in the Allegam School, Najran, Saudi Arabia" رسالة ماجستير. London Metropolitan University، لندن، 2012. مسترجع من http://search.mandumah.com/Record/612423