Ginting, Sriayu, Dewi Anzelina, Rumiris Lumbangaol, and patri silaban. “UPAYA MENINGKATAN HASIL BELAJAR SISWA DENGAN MENGGUNAKAN MODEL PROBLEM BASED INSTRUCTION ”. Jurnal Educatio FKIP UNMA 6, no. 2 (November 28, 2020): 389–394. Accessed May 1, 2025. https://www.ejournal.unma.ac.id/index.php/educatio/article/view/550.