SORENSEN, Chris; DONOVAN, Judy. An examination of factors that impact the retention of online students at a for-profit university. Online Learning, Boston, MA, v. 21, n. 3, 2017. DOI: 10.24059/olj.v21i3.935. Disponível em: https://olj.onlinelearningconsortium.org/index.php/olj/article/view/935. Acesso em: 14 apr. 2026.