TAMA, Aji Wira; UNTORO, Wisnu. Factors Affecting Brand Loyalty among Smartfren Customers. Jurnal Economia, [S. l.], v. 12, n. 2, p. 97–112, 2016. DOI: 10.21831/economia.v12i2.10820. Disponível em: https://jurnal.uny.ac.id/index.php/economia/article/view/10820. Acesso em: 8 jun. 2025.