GARCÍA DE CASTRO VALDÉS, M. Método "Mil letras". Padres y Maestros / Journal of Parents and Teachers, [S. l.], n. 280, p. 31–34, 2014. Disponível em: https://revistas.comillas.edu/index.php/padresymaestros/article/view/2012. Acesso em: 26 dic. 2024.