Bullen, M. (1999). 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, 14(1), 109–112. Retrieved from https://ijede.ca/index.php/jde/article/view/433