Raadhiyah AF. UTILIZING THE DUOLINGO APPLICATION FOR SELF-DIRECTED ENGLISH VOCABULARY LEARNING AT MTS MUHAMMADIYAH 1 SAMARINDA. JIBS: JURNAL ILMIAH BAHASA DAN SASTRA [Internet]. 2025 Jul. 22 [cited 2025 Dec. 5];12(1):103-1. Available from: http://ejournal.unikama.ac.id/index.php/JIBS/article/view/12120