HIBBARD, L. E. . Ebooks: An Alternative to Paper Books for Online Students?. International Journal of Learning, Teaching and Educational Research, [S. l.], v. 8, n. 1, p. 46–56, 2014. Disponível em: https://ijlter.net/index.php/ijlter/article/view/1155. Acesso em: 26 jul. 2026.