MARGARITA ISORAITE. Customers Loyalty Increase as Effective Tool of Sale Promotion. Global Journal of Management and Business Research, [S. l.], v. 15, n. E6, p. 33–38, 2015. Disponível em: https://journalofbusiness.org/index.php/GJMBR/article/view/1779. Acesso em: 3 may. 2024.