ESPOSO-BETAN, S. M.; FRESNIDO, A. M. CELPh’s Cooperative eBook Development Project: Implications for Future Directions. Philippine Journal of Librarianship and Information Studies, [S. l.], v. 40, n. 1, p. 5–16, 2020. Disponível em: http://www.phjlis.org/index.php/phjlis/article/view/28. Acesso em: 5 oct. 2026.