JAYA PUTRA, Rizki; ALEXANDRINA, Elke. Relationship Marketing on Loyal Customer: A Descriptive Study of Total Bangun Persada’s Customer Care Department. Ultimacomm: Jurnal Ilmu Komunikasi, [S. l.], v. 11, n. 1, p. 53–68, 2019. DOI: 10.31937/ultimacomm.v11i1.1169. Disponível em: https://ejournals.umn.ac.id/index.php/FIKOM/article/view/1169. Acesso em: 13 oct. 2025.