KHAIRUNNISA, DELLAVITRYA PUTRI, et al. “ANALYSIS FORECASTING OF OPERATIONAL EXPENSE OF PT. BANK RAKYAT INDONESIA (PERSERO) TBK”. Eqien - Jurnal Ekonomi Dan Bisnis, vol. 9, no. 2, Apr. 2022, pp. 480 – 487, doi:10.34308/eqien.v9i2.287.