Anderies, Anderies, Cindy Agustina, Tania Lipiena, Ayunda Raaziqi, and Alexander Agung Santoso Gunawan. 2023. “User Experience Analysis of Duolingo Using User Experience Questionnaire”. Engineering, MAthematics and Computer Science Journal (EMACS) 5 (3):155-59. https://doi.org/10.21512/emacsjournal.v5i3.9227.