Hartono T. PENINGKATAN MOTIVASI DAN HASIL BELAJAR SISWA DALAM MATERI AKHLAK TERPUJI MELALUI MODEL PEMBELAJARAN PROBLEM SOLVING . JPPG [Internet]. 2025 May 17 [cited 2025 Oct. 28];2(2):155-60. Available from: https://journal.barkahpublishing.com/index.php/jppg/article/view/310