Purbohadi SS, Harsono H, Prihatiningsih T, Emilia O. Applied CAL on Problem Based Learning Using Gagne’s Instructional Design. Int. J. Emerg. Technol. Learn. [Internet]. 2014 Oct. 25 [cited 2024 Nov. 23];9(9):pp. 11-16. Available from: https://online-journals.org/index.php/i-jet/article/view/4116