ANDERSON, Terry; DRON, Jon. Three generations of distance education pedagogy. The International Review of Research in Open and Distributed Learning, [S. l.], v. 12, n. 3, p. 80–97, 2011. DOI: 10.19173/irrodl.v12i3.890. Disponível em: https://www.irrodl.org/index.php/irrodl/article/view/890. Acesso em: 7 oct. 2024.