Najm Aldin، T. A. A.، و Damgaard، J. (1975). Utilization of Decision Making Tools in Small Manufacturing Firms in the State Of Colorado (رسالة دكتوراه غير منشورة). University of Northern Colorado، قريلي. مسترجع من http://search.mandumah.com/Record/614951
Najm Aldin، Taj Aldin Amin، و John Damgaard. "Utilization of Decision Making Tools in Small Manufacturing Firms in the State Of Colorado" رسالة دكتوراه. University of Northern Colorado، قريلي، 1975. مسترجع من http://search.mandumah.com/Record/614951