Ereta, A.E. et al. 2020. Determinants of banks’ cost efficiency: a case study of selected commercial banks, Ethiopia. Jurnal Perspektif Pembiayaan dan Pembangunan Daerah. 8, 3 (Aug. 2020), 231–244. DOI:https://doi.org/10.22437/ppd.v8i3.9368.