BULLEN, Mark. What’s the Difference: A Review of Contemporary Research on the Effectiveness of Distance Learning in Higher Education by Ronald Phipps and Jamie Merisotis. International Journal of E-Learning & Distance Education / Revue internationale du e-learning et la formation à distance, [S. l.], v. 14, n. 1, p. 109–112, 1999. Disponível em: https://ijede.ca/index.php/jde/article/view/433. Acesso em: 27 apr. 2024.