Purbohadi, Sri Sundari, Harsono Harsono, TS. Prihatiningsih, and O. Emilia. “Applied CAL on Problem Based Learning Using Gagne’s Instructional Design”. International Journal of Emerging Technologies in Learning (iJET) 9, no. 9 (October 25, 2014): pp. 11–16. Accessed April 28, 2024. https://online-journals.org/index.php/i-jet/article/view/4116.