“PERBEDAAN EFISIENSI BANK UMUM KONVENSIONAL : PENDEKATAN DATA ENVELOPMENT ANALYSIS ”. EKOBISMAN : JURNAL EKONOMI BISNIS MANAJEMEN 2, no. 3 (April 30, 2018): 240–261. Accessed September 28, 2026. https://journal.univpancasila.ac.id/index.php/ekobisman/article/view/1204.