Muhajir, M. and Yusuf, M. (2020) “Perhitungan Tingkat Efisiensi Bank Persero di Indonesia Periode 2015-2019 Dengan Pendekatan Non Parametrik Data Envelopment Analysis (DEA)”, Al-Kharaj: Journal of Islamic Economic and Business, 2(2), pp. 67–80. doi: 10.24256/kharaj.v2i2.1568.