“EFEKTIVITAS MODEL PROBLEM BASED LEARNING DAN MODEL GROUP INVESTIGATION BERBANTU MACROMEDIA FLASH TERHADAP KEMAMPUAN PEMAHAMAN KONSEP MATEMATIS” (2019) Prosiding Seminar Nasional Matematika dan Pendidikan Matematika, 4, pp. 309–317. Available at: https://conference.upgris.ac.id/index.php/senatik/article/view/71 (Accessed: 11 August 2026).