Bustanika, Luthf H, and Suparman. “Design of Pop up Book Based on Realistic Mathematics Education to Improving Spatial Ability Students of Class VIII”. Jurnal Pendidikan Bitara UPSI 12, no. 1 (October 15, 2019): 1–9. Accessed November 21, 2024. https://ejournal.upsi.edu.my/index.php/JPB/article/view/2651.