AMANAH A. PENERAPAN MODEL PROBLEM BASED LEARNING UNTUK MENINGKATKAN HASIL BELAJAR IPS KELAS VIIIG SMPN 1 PIYUNGAN. STRATEGI [Internet]. 2023Feb.21 [cited 2024Nov.26];3(1):9-18. Available from: https://jurnalp4i.com/index.php/strategi/article/view/1952