Elsaghier, Mahmoud Ali, Adell Saleh Amer, Rania Ahmed Elrifai, و Elgnidi Hisain Elsghier. 2025. "Six Sigma Roles for the Improvement of Company Manufacturing Processes and Waste Reduction". مجلة البحوث الأكاديمية 29 (2):50-61. https://lam-journal.ly/index.php/jar/article/view/1248.