Al Sohaibani، A. A. S.، و Carmines، E. (1991). President Reagan's Role as Chief Legislator: Explaining Variations in Congressional Support for Presidential Legislation : 1981-1988 (رسالة دكتوراه غير منشورة). Indiana University، إنديانا. مسترجع من http://search.mandumah.com/Record/610805
Al Sohaibani، Abd Alrahman Saleh، و Edward Carmines. "President Reagan's Role As Chief Legislator: Explaining Variations in Congressional Support for Presidential Legislation : 1981-1988" رسالة دكتوراه. Indiana University، إنديانا، 1991. مسترجع من http://search.mandumah.com/Record/610805