SUPRIYADI, D. Educational Cost Effectiveness through the Contribution of Teacher’s Competency and Learning Media Costs Perspective. International Journal of Management Excellence (ISSN: 2292-1648), [S. l.], v. 11, n. 3, p. 1680–1687, 2018. DOI: 10.17722/ijme.v11i3.1037. Disponível em: https://techmindresearch.org/index.php/ijme/article/view/1037. Acesso em: 13 oct. 2025.