Al Otaibi، B. N.، و Graham، S. (2001). THE USE OF CONSTANT TIME DELAY IN THE ACQUISITION OF INCIDENTAL LEARNING WHEN TEACIDNG FUNCTIONAL SIGHT WORDIPHRASES RECOGNITION TO STUDENTS WITH MODERATE AND SEVERE DISABILITIES (رسالة دكتوراه غير منشورة). Maryland University، كوليج بارك. مسترجع من http://search.mandumah.com/Record/617558
Al Otaibi، Bوer Nasser، و Steve Graham. "THE USE OF CONSTANT TIME DELAY IN THE ACQUISITION OF INCIDENTAL LEARNING WHEN TEACIDNG FUNCTIONAL SIGHT WORDIPHRASES RECOGNITION TO STUDENTS WITH MODERATE AND SEVERE DISABILITIES" رسالة دكتوراه. Maryland University، كوليج بارك، 2001. مسترجع من http://search.mandumah.com/Record/617558