NATIONS, Rick. An Evaluation of the Satisfactory-Unsatisfactory Grading Option at Florida State University. Florida Journal of Educational Research, [S. l.], v. 15, n. 1, p. 69–78, 1973. DOI: 10.62798/KFMC6246. Disponível em: https://journals.flvc.org/fjer/article/view/133833. Acesso em: 14 sep. 2026.