Zuraida, Diana Amirotuz, and Karyati Karyati. “The Effectiveness Comparison Problem Based Learning Model With NHT and TPS Type on Plane Solid Figure”. Jurnal Riset Pendidikan Matematika 5, no. 2 (November 22, 2018): 254–263. Accessed May 9, 2025. https://journal.uny.ac.id/index.php/jrpm/article/view/16444.