PRATAMA, R. A. KULIAH MELALUI WHATSAPP (KULWAPP). De Fermat : Jurnal Pendidikan Matematika, [S. l.], v. 2, n. 1, p. 17–27, 2019. DOI: 10.36277/defermat.v2i1.32. Disponível em: https://jurnal.pmat.uniba-bpn.ac.id/index.php/DEFERMAT/article/view/32. Acesso em: 21 nov. 2024.