ATUO, E. C. DATABASE MARKETING AND CUSTOMER LOYALTY OF FAST-FOOD FIRMS IN PORT HARCOURT, NIGERIA. Innovative Journal of Research in Marketing and Customer Success, [S. l.], v. 2, n. 5, p. 1–14, 2022. Disponível em: https://cirdjournals.com/index.php/ijrmcs/article/view/747. Acesso em: 24 jun. 2026.