IFADA, . I.; TOYIB, .; MARHAMAH , . Peningkatan Kemampuan Kolaborasi dalam Pembelajaran Matematika melalui Problem Based Learning Di Sekolah Menengah Pertama. PTK: Jurnal Tindakan Kelas, [S. l.], v. 4, n. 2, p. 447–460, 2024. DOI: 10.53624/ptk.v4i2.391. Disponível em: https://jurnal.ciptamediaharmoni.id/ptk/article/view/391. Acesso em: 11 oct. 2026.