BULLEN, Mark. A review of Distance Education: A Systems View. Canadian Journal of Learning and Technology, [S. l.], v. 26, n. 3, 2024. DOI: 10.21432/T20G63. Disponível em: https://cjlt.ca/index.php/cjlt/article/view/26609. Acesso em: 31 mar. 2026.