Effectiveness of Email Marketing in Improving Online Business Customer Retention. Jurnal Transformasi Digital dalam Ekonomi, Bisnis, dan Manajemen, [S. l.], v. 1, n. 4, p. 134–140, 2025. Disponível em: https://win.joninstitute.org/index.php/BIM/article/view/27. Acesso em: 24 may. 2026.