Tasman, Fridgo. “Increasing the Ability of Critical and Creative Thinking of Mathematics Teachers of West Sumatra Senior High Schools through Mathematics Learning Design With Geogebra”. Pelita Eksakta 4, no. 1 (March 31, 2021): 31-36. Accessed May 18, 2024. http://pelitaeksakta.ppj.unp.ac.id/index.php/pelitaeksakta/article/view/140.