SIAGAN, Jake. Speaking Difficulties of Grade 12 Indigenous Students in English at International School of Asia and the Pacific-Kalinga. International Journal of Education, Research, and Innovation Perspectives, Philippines, v. 2, n. 5, p. 1335–1343, 2026. DOI: 10.5281/zenodo.20329590. Disponível em: https://ijerip.erio.org.ph/index.php/articles/article/view/722. Acesso em: 22 may. 2026.