CASTRO, Angelo. Australian Open Learning Information Network. International Journal of E-Learning & Distance Education / Revue internationale du e-learning et la formation à distance, [S. l.], v. 2, n. 2, p. 65–68, 1987. Disponível em: https://ijede.ca/index.php/jde/article/view/318. Acesso em: 1 may. 2024.