Kokoh, Toni Alvoro, et al. “PENGARUH CASH TURNOVER, NET INTEREST MARGIN, LOAN TO DEPOSIT RATIO, OPERATIONAL EFFECIENCY AND COST EFFECIENCY (BOPO) TERHADAP RETURN ON ASSET (ROA) PADA PERBANKAN KONVENSIONAL YANG TERDAFTAR DI BURSA EFEK INDONESIA PERIODE 2012-2016”. Akrab Juara : Jurnal Ilmu-Ilmu Sosial, vol. 4, no. 2, May 2019, pp. 143-58, https://akrabjuara.com/index.php/akrabjuara/article/view/553.