PORTER, Eric. "Black No More"?: Walter White, Hydroquinone, and the "Negro Problem". American Studies, [S. l.], v. 47, n. 1, p. 5–30, 2006. DOI: 10.1353/amsj.v47i1.2940. Disponível em: https://journals.ku.edu/amsj/article/view/2940. Acesso em: 6 apr. 2025.