CADENHEAD, I. E. Flores Magón y el periódico "The Appeal to Reason". Historia Mexicana, [S. l.], v. 13, n. 1, p. 88–93, 1963. Disponível em: https://historiamexicana.colmex.mx/index.php/RHM/article/view/1041. Acesso em: 3 may. 2024.