PLAZA, Elena. Herbert Spencer (1820-1903): La libertad individual en el organismo social. Episteme NS, [S. l.], v. 14, n. 1-3, 2017. Disponível em: https://saber.ucv.ve/ojs/index.php/rev_ens/article/view/13033. Acesso em: 12 ago. 2026.