Rahmawati, N. ., Sumiati, M. . Safirin, Tranggono, and S. . Dewi. “Teller Services Optimization Using Lean Service Approach at PT. ABC”. Nusantara Science and Technology Proceedings, vol. 2023, no. 36, Dec. 2023, pp. 168-76, doi:10.11594/nstp.2023.3624.