VAELLO ORTS, J. La proactividad interna. Padres y Maestros / Journal of Parents and Teachers, [S. l.], n. 332, p. 30–33, 2013. Disponível em: https://revistas.comillas.edu/index.php/padresymaestros/article/view/1222. Acesso em: 29 abr. 2025.