The Influence of Relationship Marketing on Customer Loyalty of Glad2Glow Skincare Products in Medan. Proceedings of The International Conference on Computer Science, Engineering, Social Science, and Multi-Disciplinary Studies, [S. l.], v. 1, p. 418–423, 2025. DOI: 10.64803/cessmuds.v1.80. Disponível em: https://proceeding.raskhamedia.or.id/index.php/cessmuds/article/view/80. Acesso em: 7 may. 2026.