Jaca, Cristie Ann, Milyn R. Justiniane, and Grace P. Gabatilla. “Duolingo Mobile Application As a Learning Tool in Improving the High School Students’ English Speaking Skill”. Randwick International of Education and Linguistics Science Journal 7, no. 1 (March 31, 2026): 40-48. Accessed May 6, 2026. https://www.randwickresearch.com/index.php/rielsj/article/view/1157.