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ANALISIS PROSES KERJA BILLING, COLLECTION, DAN RETENTION DALAM MENJAGA RETENSI PELANGGAN INDIHOME DI PT TELKOMSEL BRANCH LAMPUNG. JGGEconomic [Internet]. 2026 May 15 [cited 2026 Sep. 9];2(2):38-47. Available from: https://ejournal.lppnusantara.com/index.php/JGGEconomic/article/view/791