AL-KAFAF, S.; AL-KERO, R. Marketing of Information Services: Its Concepts and Methods in Libraries. اداب الرافدین, [S. l.], v. 39, n. 53, p. 479–498, 2009. DOI: 10.33899/radab.2009.31969. Disponível em: https://radab.uomosul.edu.iq/index.php/radab/article/view/31875. Acesso em: 13 dec. 2025.