KLOR DE ALVA, Jorge. Advances in Online Education at For-Profit Colleges and Universities. Online Learning, Boston, MA, v. 15, n. 2, 2011. DOI: 10.24059/olj.v15i2.220. Disponível em: https://olj.onlinelearningconsortium.org/index.php/olj/article/view/220. Acesso em: 4 apr. 2026.