Y MAESTROS, P. Sentido del esfuerzo. Padres y Maestros / Journal of Parents and Teachers, [S. l.], n. 19, p. 30–33, 2015. Disponível em: https://revistas.comillas.edu/index.php/padresymaestros/article/view/6186. Acesso em: 20 abr. 2024.