Hartina, S., Syahrir and Syafar, N. F. (2026) “TEACHER-MEDIATED DUOLINGO USE AND VOCABULARY GAINS AMONG JUNIOR HIGH SCHOOL EFL LEARNERS IN INDONESIAN CONTEXT”, e-Journal of ELTS (English Language Teaching Society), 14(03), pp. 315–327. doi: 10.22487/elts.v14i03.6375.