Hartati S. MENINGKATKAN HASIL BELAJAR SOSIOLOGI SISWA KELAS XI IPS 1 SMA NEGERI 2 LABUAPI MELALUI PENERAPAN MODEL PROBLEM BASED LEARNING . MADU [Internet]. 2023 Apr. 27 [cited 2025 Jul. 27];1(1):193-204. Available from: https://institutpermatamandalika.com/index.php/MADU/article/view/73