Maintaining ISO 9001:2015 in Higher Education Institutions in Cordillera Administrative Region, Philippines. Indonesian Journal of Education Research (IJoER), [S. l.], v. 6, n. 3, p. 340–353, 2025. DOI: 10.37251/ijoer.v6i3.1739. Disponível em: https://cahaya-ic.com/index.php/IJoER/article/view/1739. Acesso em: 6 jun. 2026.