Yumelda D, Nadrun, Amiati DR. The Effectiveness of Problem-Based Learning in Enhancing Junior High School Students’ Speaking Skill. JOFLER [Internet]. 2026May7 [cited 2026May19];7(2):18-5. Available from: https://jurnal.unismuhpalu.ac.id/index.php/JOFLER/article/view/3818