Al Thubaiti، A. A. A.، و Brookove، W. (1983). THE IMPACT OF THE SCHOOL AS A SOCIAL SYSTEM, AND OF FAMILY BACKGROUND, ON STUDENT ACHIEVEMENT IN SELECTED SCHOOLS IN THE WESTERN PART OF SAUDI ARABIA (رسالة دكتوراه غير منشورة). Michigan State University، إيست لانسنغ. مسترجع من http://search.mandumah.com/Record/614010
Al Thubaiti، Abd Allah Ayed، و Wilber Brookove. "THE IMPACT OF THE SCHOOL AS A SOCIAL SYSTEM, AND OF FAMILY BACKGROUND, ON STUDENT ACHIEVEMENT IN SELECTED SCHOOLS IN THE WESTERN PART OF SAUDI ARABIA" رسالة دكتوراه. Michigan State University، إيست لانسنغ، 1983. مسترجع من http://search.mandumah.com/Record/614010