HERTZEL, David. The World History Workbook: An Alternative to Commercial Textbooks. World History Connected, [S. l.], v. 3, n. 2, 2006. DOI: 10.13021/whc.v3i2.5095. Disponível em: https://journals.gmu.edu/whc/article/view/5095. Acesso em: 10 jan. 2026.