Mateos, Pedro M., Meilán, Juan J. G., y Arana, José M. 2002. Motivational versus volitional mediation of passivity in institutionalized older people. The Spanish Journal of Psychology 5, 1, 54. Recuperado 6 de diciembre de 2025 a partir de https://revistas.ucm.es/index.php/SJOP/article/view/SJOP0202120054A