LUDWIG, Stacey. Learner Support in Open, Distance and Online Learning Environments. The International Review of Research in Open and Distributed Learning, [S. l.], v. 6, n. 2, 2005. DOI: 10.19173/irrodl.v6i2.230. Disponível em: https://www.irrodl.org/index.php/irrodl/article/view/230. Acesso em: 22 nov. 2024.