Relationship between Customers’ Loyalty and Income: Preliminary Research. ENTRENOVA - ENTerprise REsearch InNOVAtion, [S. l.], v. 1, n. 1, p. 65–70, 2015. Disponível em: https://ojs.srce.hr/index.php/entrenova/article/view/14386. Acesso em: 19 aug. 2025.