Al Nuwaiser، W.، و Norton، J. J. (2005). The Saudi Approach to Directing Foreign Oil Investment and its effect on Saudi Economic Development and the Oil Market (رسالة دكتوراه غير منشورة). Southern Methodist University، دالاس. مسترجع من http://search.mandumah.com/Record/616622
Al Nuwaiser، Waleed، و Joseph J. Norton. "The Saudi Approach to Directing Foreign Oil Investment and Its Effect On Saudi Economic Development and the Oil Market" رسالة دكتوراه. Southern Methodist University، دالاس، 2005. مسترجع من http://search.mandumah.com/Record/616622