SCHÜTT-HOHENSTEIN, A. E-Books und E-Book-Pakete. WLBforum, Stuttgart, v. 15, n. 2, p. 13–16, 2013. DOI: 10.53458/wlbf.v15i2.253. Disponível em: https://journals.wlb-stuttgart.de/ojs/index.php/wlbf/article/view/253. Acesso em: 10 aug. 2022.