MELIANINGSIH, Nuning; SUGIMAN, Sugiman. Keefektifan pendekatan open-ended dan problem solving pada pembelajaran bangun ruang sisi datar di SMP. Jurnal Riset Pendidikan Matematika, [S. l.], v. 2, n. 2, p. 211–223, 2015. DOI: 10.21831/jrpm.v2i2.7335. Disponível em: https://journal.uny.ac.id/index.php/jrpm/article/view/7335. Acesso em: 2 jul. 2025.