HUMMEL, Hans G. K. Feedback Model to Support Designers of Blended Learning Courses. The International Review of Research in Open and Distributed Learning, [S. l.], v. 7, n. 3, 2006. DOI: 10.19173/irrodl.v7i3.379. Disponível em: https://www.irrodl.org/index.php/irrodl/article/view/379. Acesso em: 23 apr. 2024.