Alismaiel, Omar. “Develop a New Model to Measure the Blended Learning Environments Through Students’ Cognitive Presence and Critical Thinking Skills”. International Journal of Emerging Technologies in Learning (iJET) 17, no. 12 (June 21, 2022): pp. 150–169. Accessed August 15, 2022. https://online-journals.org/index.php/i-jet/article/view/30141.