Evaluating the Process of Education Using Six Sigma in College of Administration and Economics at the University of Sulaimaniah. مجلة الإدارة والاقتصاد, [S. l.], n. 119, p. 95–107, 2022. Disponível em: https://admics.uomustansiriyah.edu.iq/index.php/admeco/article/view/507. Acesso em: 10 2025.