Ramadhani, Anggita, Cheria Tri De Afril Samsul, and Nuryanti Nuryanti. “The Effect of Using Duolingo Application on Students’ Vocabulary Mastery”. Journal of Language Learning and Assessment 4, no. 2 (August 30, 2026): 66–71. Accessed September 10, 2026. https://e-journal.naifaderu.org/index.php/jlla/article/view/146.