RUMBLE, Greville. THE COSTS AND COSTING OF NETWORKED LEARNING. Online Learning, Boston, MA, v. 5, n. 2, 2019. DOI: 10.24059/olj.v5i2.1880. Disponível em: https://olj.onlinelearningconsortium.org/index.php/olj/article/view/1880. Acesso em: 2 apr. 2026.