Al Hussaine، A. A. S.، و Brown، W. G. (1989). The Impact of Agricultural Price Policies On The Supply and Demand for Agricultural Products: The Case of Barley and Wheat in Saudi Arabia (رسالة دكتوراه غير منشورة). Oregon State University، اوريجون. مسترجع من http://search.mandumah.com/Record/614436
Al Hussaine، Abd Alaziz S.، و William G. Brown. "The Impact of Agricultural Price Policies On The Supply and Demand for Agricultural Products: The Case of Barley and Wheat in Saudi Arabia" رسالة دكتوراه. Oregon State University، اوريجون، 1989. مسترجع من http://search.mandumah.com/Record/614436