TORANG SIREGAR; AHMAD ARISMAN; ISKANDARSYAH; RISKY ARDIAN; AWAL HARAHAP. Research And Developing Mathematics Knowledge Child Development Perspectives, 2022. Elementaria: Journal of Educational Research, [S. l.], v. 1, n. 2, p. 65–76, 2023. DOI: 10.61166/elm.v1i2.11. Disponível em: https://elementaria.my.id/index.php/e/article/view/11. Acesso em: 19 sep. 2024.