COLLINS, M. E.; MITCHELL, N. K.; NOJEIM, M. J. Removing the Excuse: Using Free Course Materials to Improve Student Success in General Studies Courses. Journal of Higher Education Theory and Practice, [S. l.], v. 20, n. 5, 2020. DOI: 10.33423/jhetp.v20i5.3041. Disponível em: https://articlegateway.com/index.php/JHETP/article/view/3041. Acesso em: 17 jul. 2024.