Laila Nursafitri, Herminarto Sofyan, Ali Muhtadi. “Developing Constructivist-Based Blended Learning Model to Increase Critical Thinking Skills”. International Journal of Advanced Science and Technology 29, no. 06 (May 1, 2020): 4832 - 4840. Accessed October 13, 2026. http://sersc.org/journals/index.php/IJAST/article/view/19407.