ANALYSIS OF BANK OPERATIONAL PERFORMANCE EFFICIENCY USING OPERATIONAL COST RATIO ON OPERATIONAL INCOME AT PT. BPR CENTRAL SEJAHTERA TANJUNGPINANG. EKONOMIKA, [S. l.], v. 1, n. 02, p. 29–38, 2021. DOI: 10.52624/cash.v1i02.2224. Disponível em: https://journal.stie-pembangunan.ac.id/index.php/cash/article/view/2224. Acesso em: 1 jan. 2026.