Fadel Ibrahim, M. “The Role of Organizational Efficiency in Organizational Success of Organizations: Field Research in Zain Telecom in Iraq”. Baghdad College of Economic Sciences University Journal (BCESUJ), vol. 64, no. 4, Apr. 2021, pp. 427-42, https://bcuj.baghdadcollege.edu.iq/index.php/BCESUJ/article/view/162.