Al Babtain، I. A.، و Olson، M. (1980). A Survey of Mathematics Curriculum of Junior Colleges for Training of the Elementary Teacher in Saudi Arabia (رسالة دكتوراه غير منشورة). University of Wyoming، لارامي. مسترجع من http://search.mandumah.com/Record/617304
Al Babtain، Ibrahim A.، و Melfried Olson. "A Survey of Mathematics Curriculum of Junior Colleges for Training of the Elementary Teacher in Saudi Arabia" رسالة دكتوراه. University of Wyoming، لارامي، 1980. مسترجع من http://search.mandumah.com/Record/617304