Ferhat، A. (2016). Professional Bureaucracy: A Support for the Implementation of the Lean Six Sigma Method In Higher Education. مجلة دراسات العدد الاقتصادي، مج7, ع3 ، 361 - 371. مسترجع من http://search.mandumah.com/Record/1179904
Ferhat، Ahmida. "Professional Bureaucracy: A Support for the Implementation of the Lean Six Sigma Method In Higher Education." مجلة دراسات العدد الاقتصادي مج7, ع3 (2016): 361 - 371. مسترجع من http://search.mandumah.com/Record/1179904