Cragg, C.E. (Betty), Jean Dunning, and Jaqueline Ellis. 2008. “Teacher and Student Behaviors in Face-to-Face and Online Courses: Dealing With Complex Concepts”. International Journal of E-Learning & Distance Education Revue Internationale Du E-Learning Et La Formation à Distance 22 (3):115-28. https://www.ijede.ca/index.php/jde/article/view/45.