GARRISON, Randy. Implications of Online and Blended Learning for the Conceptual Development and Practice of Distance Education. International Journal of E-Learning & Distance Education / Revue internationale du e-learning et la formation à distance, [S. l.], v. 23, n. 2, p. 93–104, 2009. Disponível em: https://www.ijede.ca/index.php/jde/article/view/471. Acesso em: 23 apr. 2024.