PERMAN, Michael. Lincoln, the Civil War, and the New Approval-Ratings. American Studies, [S. l.], v. 36, n. 1, p. 131–135, 1995. DOI: 10.1353/amsj.v36i1.2814. Disponível em: https://journals.ku.edu/amsj/article/view/2814. Acesso em: 28 apr. 2025.