Sari Mahibatus Saniyah. “Duolingo and Learner Autonomy: Investigating The Role of Personalization and Gamification in Promoting Self-Directed Language Learning”. ENJEL: English Journal of Education and Literature 2, no. 02 (December 27, 2023): 141–147. Accessed May 10, 2024. http://jsr.unuha.ac.id/index.php/ENJEL/article/view/529.