Batmanlusi, Adam, Ignatius J. C. Tuerah, and Olga A. Rorintulus. “THE USE OF DUOLINGO TO IMPROVE STUDENTS’ VOCABULARY AT SMP NEGERI 8 SATU ATAP TONDANO ”. JoTELL : Journal of Teaching English, Linguistics, and Literature 3, no. 5 (May 18, 2024): 542-552. Accessed December 22, 2024. https://ejurnal.unima.ac.id/index.php/jotell/article/view/9167.