Al Batel، A. A. H.، و Wilbur، W. (1993). The Roles of Financial Institutions in Economic Development: Savings, Investment and Income Growth -The Case of Saudi Arabia, 1965-1989 (رسالة دكتوراه غير منشورة). Northern Illinois University، ديكالب. مسترجع من http://search.mandumah.com/Record/617544
Al Batel، Abd Allah H.، و William Wilbur. "The Roles of Financial Institutions in Economic Development: Savings, Investment and Income Growth -The Case of Saudi Arabia, 1965-1989" رسالة دكتوراه. Northern Illinois University، ديكالب، 1993. مسترجع من http://search.mandumah.com/Record/617544