Al Agla، A. A. A. F.، و Gregory، T. B. (1985). The strengths and weaknesses of the elementary new mathematics curriculum in Saudi Arabia: The views of four groups of educators (رسالة دكتوراه غير منشورة). Indiana University، إنديانا. مسترجع من http://search.mandumah.com/Record/612267
Al Agla، Abd Alaziz Ali Farraj، و Thomas B. Gregory. "The Strengths and Weaknesses of the Elementary New Mathematics Curriculum in Saudi Arabia: The Views of Four Groups of Educators" رسالة دكتوراه. Indiana University، إنديانا، 1985. مسترجع من http://search.mandumah.com/Record/612267