HARPHAM, Geoffrey. Jack London and the Tradition of Superman soicalism. American Studies, [S. l.], v. 16, n. 1, p. 23–33, 1975. DOI: 10.1353/amsj.v16i1.2346. Disponível em: https://journals.ku.edu/amsj/article/view/2346.. Acesso em: 2 may. 2024.