Choo, Chee Yan, Mathumalar Loganathan Fahrni, and Chiau Ming Long. “Analysis of Students’ Cognitive Presence and Perception in a Custom-Designed Virtual Problem Based Learning Assignment”. International Journal of Emerging Technologies in Learning (iJET) 17, no. 22 (November 28, 2022): pp. 132–143. Accessed April 27, 2024. https://online-journals.org/index.php/i-jet/article/view/32777.