Al Thomaley، M. M.، و Madden، J. F. (1986). Meeting Labor Shortage With Expatriate Workers: The Effects of Immigration on Domeatic Wage and Employment Levela in the Private Non-Agricultural Sector in Saudi Arabia (رسالة دكتوراه غير منشورة). University of Pennsylvania، فيلادلفيا. مسترجع من http://search.mandumah.com/Record/619194
Al Thomaley، Mohammad Mosleh، و Janice F. Madden. "Meeting Labor Shortage With Expatriate Workers: The Effects of Immigration On Domeatic Wage and Employment Levela in the Private Non-Agricultural Sector in Saudi Arabia" رسالة دكتوراه. University of Pennsylvania، فيلادلفيا، 1986. مسترجع من http://search.mandumah.com/Record/619194