Muhajir, Muhajir, and Muhammad Yusuf. 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):67-80. https://doi.org/10.24256/kharaj.v2i2.1568.