DENNEN, Vanessa P.; BAGDY, Lauren M. From Proprietary Textbook to Custom OER Solution: Using Learner Feedback to Guide Design and Development. Online Learning, Boston, MA, v. 23, n. 3, 2019. DOI: 10.24059/olj.v23i3.2068. Disponível em: https://olj.onlinelearningconsortium.org/index.php/olj/article/view/2068. Acesso em: 27 mar. 2026.