RAHMAWATI, Fitriana; RISNAWATI, Risnawati. PENGARUH PENERAPAN STRATEGI CLASS CONCERN TERHADAP KEMAMPUAN PEMECAHAN MASALAH MATEMATIKA SISWA. HISTOGRAM: Jurnal Pendidikan Matematika, [S. l.], v. 3, n. 2, p. 162–171, 2020. DOI: 10.31100/histogram.v3i2.425. Disponível em: https://journal.matappa.ac.id/index.php/histogram/article/view/425. Acesso em: 16 jan. 2026.