PENINGKATAN HASIL BELAJAR MENGENAI MATERI KELANGKAAN EKONOMI MELALUI METODE PROBLEM BASED LEARNING PBL KELAS X IIS SMA NEGERI 17 HALMAHERA SELATAN. jpe-unima [Internet]. 2025 Oct. 23 [cited 2026 Mar. 25];4(2s):12 17. Available from: https://ejurnal.unima.ac.id/index.php/jpe-unima/article/view/8098