Budi Nurwahyu, Georgina Maria Tinungki. “Concept Image and Its Influence on Beliefs: Case Study on Undergraduate Engineering Students in Solving of Calculus Concept Problems”. International Journal of Advanced Science and Technology 29, no. 05 (April 22, 2020): 2227 - 2243. Accessed May 4, 2024. http://sersc.org/journals/index.php/IJAST/article/view/10990.