“ANALISIS PROSES KERJA BILLING, COLLECTION, DAN RETENTION DALAM MENJAGA RETENSI PELANGGAN INDIHOME DI PT TELKOMSEL BRANCH LAMPUNG”, JGGEconomic, vol. 2, no. 2, pp. 38–47, May 2026, doi: 10.65244/jggeconomic.v2i2.791.