UPAYA MENINGKATKAN MOTIVASI BELAJAR EKONOMI MELALUI MODEL PEMBELAJARAN PROBLEM BASED LEARNING KELAS VIIA SMP NEGERI 3 WAMENA. jpe-unima [Internet]. 2025 Oct. 23 [cited 2026 Mar. 4];4(2s):263 268. Available from: https://ejurnal.unima.ac.id/index.php/jpe-unima/article/view/8153