PENGARUH MODEL PROBLEM BASED LEARNING TERHADAP HASIL BELAJAR SISWA PADA MATERI INDEKS HARGA DIKELAS XI.1 SMA NEGERI 11 PALEMBANG. AL-MUQADDIMAH [Internet]. 2026 Jan. 3 [cited 2026 May 25];2(1):52-9. Available from: https://jurnal-muqaddimah.or.id/index.php/Al-Muqaddimah/article/view/45