Nurcahyono, N. A. and Sani, S. (2021) “FREE LEARNING IN LEARNING CALCULUS BASED ON PROBLEM POSING AND PROBLEM-SOLVING”, De Fermat : Jurnal Pendidikan Matematika, 3(2), pp. 1–9. Available at: https://jurnal.pmat.uniba-bpn.ac.id/index.php/DEFERMAT/article/view/77 (Accessed: 29March2024).