RONQUILLO, John Walter. Professional Development and Barriers Among Elementary Teachers in Sofronio Española: A Basis for A Professional Development Plan. International Journal of Education, Research, and Innovation Perspectives, Philippines, v. 2, n. 3, p. 661–718, 2026. DOI: 10.5281/zenodo.19008263. Disponível em: https://ijerip.erio.org.ph/index.php/articles/article/view/240. Acesso em: 22 mar. 2026.