BAI, Xin; SMITH, Michael B. Promoting Hybrid Learning through an Open Source EBook Approach. Online Learning, Boston, MA, v. 14, n. 3, 2010. DOI: 10.24059/olj.v14i3.139. Disponível em: https://olj.onlinelearningconsortium.org/index.php/olj/article/view/139. Acesso em: 25 mar. 2026.