Natrion, Novriyanti Siagian. Pengaruh Biaya Operasional Pendapatan Operasional Dan Non Performing Loan Terhadap Net Profit Margin (Studi Pada Bank Busn Devisa Yang Terdaftar Di Bursa Efek Indonesia Periode 2011-2015). liabilitas [Internet]. 2018 Feb. 1 [cited 2026 Apr. 19];3(1):77-89. Available from: https://www.ojs.jekobis.org/index.php/liabilitas/article/view/33