Sofian, Muhammad, Ilham Ilham, and Moh. Fauzi Bafadal. “Students Perception of Using the Duolingo Application in Mastering English Language Skills in an English Study Program”. Journal of English Culture, Language, Literature and Education 13, no. 2 (July 5, 2025): 183–198. Accessed August 11, 2025. https://ejurnal.unima.ac.id/index.php/e-clue/article/view/11734.