Pakpahan, M. . Analisa Sistem Penagihan Jasa Transponder Lease Pada Satelit Palapa C-2 Di PT. Indosat Ooredoo Hutchison Tbk: Billing System Analysis Transponder Lease Services On Satellite Palapa C-2 at PT. Indosat Ooredoo Hutchison Tbk. KRESNA 2022, 2, 86-96.