NURCAHYONO, N. A.; SANI, S. FREE LEARNING IN LEARNING CALCULUS BASED ON PROBLEM POSING AND PROBLEM-SOLVING. De Fermat : Jurnal Pendidikan Matematika, [S. l.], v. 3, n. 2, p. 1–9, 2021. Disponível em: https://jurnal.pmat.uniba-bpn.ac.id/index.php/DEFERMAT/article/view/77. Acesso em: 29 mar. 2024.