ASHRAF, J. Equal Effectiveness of Kumon Method of Teaching Mathematics among Boys & Girls. Journal of English Language and Literature (ISSN: 2368-2132), [S. l.], v. 9, n. 3, p. 906–913, 2018. DOI: 10.17722/jell.v9i3.370. Disponível em: https://techmindresearch.org/index.php/jell/article/view/370. Acesso em: 11 oct. 2025.