SADIK, Alaa. Papers and Debates on the Economics and Costs of Distance and Online Learning. The International Review of Research in Open and Distributed Learning, [S. l.], v. 5, n. 3, 2004. DOI: 10.19173/irrodl.v5i3.201. Disponível em: https://www.irrodl.org/index.php/irrodl/article/view/201. Acesso em: 20 apr. 2024.