WATT, Michael G. Research on the Textbook Publishing Industry in the United States of America. IARTEM e-journal, Kongsberg, Norway, v. 1, n. 1, p. 36–52, 2007. DOI: 10.21344/iartem.v1i1.804. Disponível em: https://mail.iartemejournal.org/index.php/IARTEM/article/view/804.. Acesso em: 19 apr. 2026.