Al Drees، I. A.، و Shaffer، R. H. (1982). LEADERSHIP AS A VARIABLE IN INSTITUTION BUILDING: TOWARD QUALIFIED LEADERSHIP FOR JUNIOR COLLEGES IN SAUDI ARABIA (رسالة دكتوراه غير منشورة). Indiana University، إنديانا. مسترجع من http://search.mandumah.com/Record/612554
Al Drees، Ibrahim A.، و Robert H. Shaffer. "LEADERSHIP AS A VARIABLE IN INSTITUTION BUILDING: TOWARD QUALIFIED LEADERSHIP FOR JUNIOR COLLEGES IN SAUDI ARABIA" رسالة دكتوراه. Indiana University، إنديانا، 1982. مسترجع من http://search.mandumah.com/Record/612554