Berenika Mbulu, Y. ., and I. Kholid. “Evaluation of Complaint Handling: Case Study of Cashier Section PT Surabaya Industrial Estate Rungkut”. International Journal of Science and Environment (IJSE), vol. 5, no. 3, Aug. 2025, pp. 417-9, doi:10.51601/ijse.v5i3.203.