AL-KHALDI, N. F. H. .; ZGHAIR , M. W. . Employing the Six Sigma (SS) methodology to reduce the costs of banking service quality: An applied research in Gulf Commercial Bank. Manar Elsharq Journal for Management and Commerce Studies, [S. l.], v. 1, n. 4, p. 11–21, 2024. DOI: 10.56961/mejmcs.v1i4.535. Disponível em: http://meijournals.com/ara/index.php/mejcms/article/view/535. Acesso em: 27 jul. 2024.