Aulia, S. ., A. H. Qomar, and A. . Latif. “The Use of Duolingo to Boost Students’ Vocabulary Mastery at Seventh Grade in Class An-Nisa of SMP Muhammadiyah At-Tanwir Metro”. International Proceedings Conferences Series, vol. 3, no. 1, July 2025, pp. 87-102, doi:10.22236/ie.v3i1.832.