The grading system guidelines for Open University. New Trends and Issues Proceedings on Humanities and Social Sciences, [S. l.], v. 4, n. 1, p. 132–138, 2017. DOI: 10.18844/prosoc.v4i1.2244. Disponível em: https://un-pub.eu/ojs/index.php/pntsbs/article/view/2244. Acesso em: 25 nov. 2024.