YULIANIS, Yulianis. Peningkatan Hasil Belajar Matematika Melalui Model Problem Based Learning (PBL) Pada Peserta Didik Kelas VIII SMP Negeri 9 Dumai Tahun Pelajaran 2021/2022. Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal), [S. l.], v. 4, n. 1, p. 14–19, 2023. DOI: 10.29303/goescienceed.v4i1.220. Disponível em: https://jpfis.unram.ac.id/index.php/GeoScienceEdu/article/view/220. Acesso em: 28 oct. 2025.