The quality of customer service in the retention and loyalty of service companies. Revista Universidad de Guayaquil, [S. l.], v. 139, n. 2, p. 1–20, 2025. DOI: 10.53591/rug.v139i2.2066. Disponível em: https://revistas.ug.edu.ec/index.php/rug/article/view/2066. Acesso em: 5 dec. 2025.