Impact Of Management And Marketing Practices On Service Effectiveness In Non-Profit Organizations: A Quantitative Study Of Libraries. Advance Journal of Econometrics and Finance, [S. l.], v. 4, n. 1, p. 694–710, 2026. DOI: 10.63075/9cyzjw57. Disponível em: https://www.ajeaf.com/index.php/Journal/article/view/253. Acesso em: 18 apr. 2026.