PASARIBU, A. P.; SOFNIDAR, S.; IRIANI, D. The Effect of Gobak Sodor Based Outdoor Learning on Seventh Grade Students Collaborative Character in Algebra. Jurnal Pendidikan Matematika (JPM), [S. l.], v. 12, n. 1, p. 1–13, 2026. DOI: 10.33474/jpm.v12i1.24984. Disponível em: https://riset.unisma.ac.id/index.php/jpm/article/view/24984. Acesso em: 22 sep. 2026.