Analisis Rasio Capital Adequacy Ratio (CAR), Biaya Operasional per Pendapatan Operasional (BOPO), Loan to Deposit Ratio (LDR) dan Non Performing Loan (NPL) terhadap Return on Asset (ROA) Perbankan (Studi Pada Bank Umum yang Terdaftar di Bursa Efek Indonesia Periode 2016-2017) - Manurung, Yoga Leonard (2019)