Pasaribu, Ajeng Prasasti, Sofnidar, and Dewi Iriani. “The Effect of Gobak Sodor Based Outdoor Learning on Seventh Grade Students Collaborative Character In Algebra”. Jurnal Pendidikan Matematika (JPM) 12, no. 1 (March 13, 2026): 01–13. Accessed July 21, 2026. https://riset.unisma.ac.id/index.php/jpm/article/view/24984.