Sukmawati, F., S. A. Putri, and M. Amaliyah. “The Effect of Third-Party Funds (DPK) and Non-Performing Loans (NPL) Upon Operating Costs of Operating Income (BOPO) (Case Study on Conventional Commercial Banks for the 2017-2021 Period)”. TEC EMPRESARIAL, vol. 17, no. 2, Dec. 2022, pp. 245-5, doi:10.1229/tecempresarialjournal.v17i2.104.