ZHOU, Ruidong. Research on the Application of Six Sigma Management in the Service Industry. International Journal of Global Economics and Management, [S. l.], v. 10, n. 1, p. 50–58, 2026. DOI: 10.62051/ijgem.v10n1.08. Disponível em: https://ijgem.org/index.php/ojs/article/view/278. Acesso em: 18 apr. 2026.