CUSKER, J. Online Textbook Piracy: A Literature Review. Issues in Science and Technology Librarianship, [S. l.], n. 84, 2016. DOI: 10.5062/F4154F2X. Disponível em: https://journals.library.ualberta.ca/istl/index.php/istl/article/view/1682. Acesso em: 12 may. 2021.