FREDERICKSEN, Eric E. A National Study of Online Learning Leaders in US Community Colleges. Online Learning, Boston, MA, v. 22, n. 4, 2019. DOI: 10.24059/olj.v22i4.1458. Disponível em: https://olj.onlinelearningconsortium.org/index.php/olj/article/view/1458. Acesso em: 29 mar. 2026.