The Effect of Organizational Structure and Ngo-Ngo Relationships on Sustainability in NGOs. European Journal of Marketing and Economics, [S. l.], v. 8, n. 4, p. 186–192, 2025. DOI: 10.26417/ftj6hs50. Disponível em: https://revistia.com/index.php/ejme/article/view/3545. Acesso em: 12 may. 2026.