Megawati, Hamid R, Sangkala I. Improving the Vocabulary of the Students by Using Duolingo Application at the Second Grade of SMP Negeri 1 Kelara. ELTM [Internet]. 2023 Apr. 15 [cited 2024 Jul. 3];3(1):13-9. Available from: https://jurnal.fkip.unismuh.ac.id/index.php/eltm/article/view/176