Permatasari, Diah, and Farida Aryani. “DUOLINGO: AN ENCHANTING APPLICATION TO LEARN ENGLISH FOR COLLEGE STUDENTS”. ELTR Journal 7, no. 2 (July 13, 2023): 101-109. Accessed April 29, 2025. https://eltr.apspbi.or.id/index.php/eltr/article/view/176.