Kaban, S., J. Sakmal, Y. Auliaty, A. Marini, and A. Wahyudi. “Model of Creative Thinking Skills for Elementary School Students”. International Journal of Control and Automation, Vol. 12, no. 4, Oct. 2019, pp. 70 -76, https://sersc.org/journals/index.php/IJCA/article/view/517.