Raadhiyah, A.F. 2025. UTILIZING THE DUOLINGO APPLICATION FOR SELF-DIRECTED ENGLISH VOCABULARY LEARNING AT MTS MUHAMMADIYAH 1 SAMARINDA. (JIBS) JURNAL ILMIAH BAHASA DAN SASTRA. 12, 1 (Jul. 2025), 103–113. DOI:https://doi.org/10.21067/jibs.v12i1.12120.