Putrawangsa, Susilahudin, and Uswatun Hasanah. “Students’ Prior Understanding of Area”. Beta: Jurnal Tadris Matematika 8, no. 2 (November 14, 2015): 100–114. Accessed July 1, 2026. http://jurnalbeta.ac.id/index.php/betaJTM/article/view/28.