JEFRI, J.; JUNAEDA, J.; SUHARLINA, S. The Effect of Service Quality and Product Diversity on Customer Loyalty . Golden Ratio of Marketing and Applied Psychology of Business, [S. l.], v. 4, n. 2, p. 290–298, 2024. DOI: 10.52970/grmapb.v4i2.1163. Disponível em: https://www.goldenratio.id/index.php/grmapb/article/view/1163. Acesso em: 21 apr. 2026.