OLIVEROS, . O. .; VALLEJO, . G. The XXI century guidance and its social responsibility. Orientación y Sociedad, [S. l.], n. no. 8, p. 8 p., 2008. Disponível em: https://revistas.unlp.edu.ar/OrientacionYSociedad/article/view/8281. Acesso em: 7 may. 2024.