TIGHT, Malcolm. Distance Education: Discipline and Service. International Journal of E-Learning & Distance Education / Revue internationale du e-learning et la formation à distance, [S. l.], v. 3, n. 1, p. 81–84, 1988. Disponível em: https://ijede.ca/index.php/jde/article/view/537. Acesso em: 26 nov. 2024.