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 2, no. 5 (May 22, 2026): 1335–1343. Accessed May 22, 2026. https://ijerip.erio.org.ph/index.php/articles/article/view/722.