ANALISIS PROSES KERJA BILLING, COLLECTION, DAN RETENTION DALAM MENJAGA RETENSI PELANGGAN INDIHOME DI PT TELKOMSEL BRANCH LAMPUNG. Journal of Golden Generation Economic, [S. l.], v. 2, n. 2, p. 38–47, 2026. DOI: 10.65244/jggeconomic.v2i2.791. Disponível em: https://ejournal.lppnusantara.com/index.php/JGGEconomic/article/view/791. Acesso em: 9 sep. 2026.