Yuniar Yuniar, et al. “The Effectiveness of AI-Based Application Duolingo in Enhancing Students’ Vocabulary Mastery Among Indonesian EFL Learners”. Sintaksis : Publikasi Para Ahli Bahasa Dan Sastra Inggris, vol. 4, no. 1, Jan. 2026, pp. 30-41, doi:10.61132/sintaksis.v4i1.2463.