Suftah، A. A. H.، و Key، J. P. (1987). A STUDY OF VOCATIONAL TRAINING CENTERS ON DROPOUTS ASSOCIATED WITH THE MINISTRY OF LABOR AND SOCIAL AFFAIRS IN THE KINGDON OF SAUDI ARABIA (رسالة ماجستير غير منشورة). Oklahoma State University، ستيلووتر. مسترجع من http://search.mandumah.com/Record/617719
Suftah، Abd Alrahim H.، و James P. Key. "A STUDY OF VOCATIONAL TRAINING CENTERS ON DROPOUTS ASSOCIATED WITH THE MINISTRY OF LABOR AND SOCIAL AFFAIRS IN THE KINGDON OF SAUDI ARABIA" رسالة ماجستير. Oklahoma State University، ستيلووتر، 1987. مسترجع من http://search.mandumah.com/Record/617719