Siti Nuraini, et al. “Peningkatan Hasil Belajar Siswa Melalui Model Pembelajaran Problem Based Learning (PBL) Pada Materi Norma Kelas VI”. Jurnal Penelitian Pendidikan Indonesia (JPPI), vol. 2, no. 4, May 2025, pp. 125-31, https://doi.org/10.62017/jppi.v2i4.4456.