UMUKORO, S.; MOMOH, A. K. Effective Customer Service: A Tool for Growth and Sustainability of Small and Medium Enterprises in Nigeria . Nigerian Academy of Management Journal, [S. l.], v. 16, n. 1, p. 136–143, 2021. Disponível em: https://namj.tamn-ng.org/index.php/home/article/view/138. Acesso em: 16 jan. 2026.