SADEWA, Ifan. 4P Increase Customer Loyalty. Siber Nusantara of Economic and Finance Review, [S. l.], v. 1, n. 1, p. 14–23, 2024. Disponível em: https://research.e-siber.org/SNEFR/article/view/271. Acesso em: 22 dec. 2024.