J.E. EVERETT, K. MALLOUK, J. MORGAN, J. STANZIONE. Online Practice Problem Strategies. Journal of Online Engineering Education, [S. l.], v. 5, n. 2, 2014. Disponível em: https://onlineengineeringeducation.com/index.php/joee/article/view/62. Acesso em: 19 may. 2024.