BARUS, D. B. Pengembangan Media Pembelajaran Matematika Berbasis Budaya Batak Toba. Cartesius : Jurnal Pendidikan Matematika, [S. l.], v. 2, n. 2, p. 45–61, 2020. DOI: 10.54367/cartesius.v2i2.605. Disponível em: https://ejournal.ust.ac.id/index.php/CARTESIUS/article/view/605. Acesso em: 22 jul. 2024.