Purba, I. A., Surjasa, D. and Safitri, D. M. (2024) “The influence of service quality on customer satisfaction in maintaining loyalty at Coco SPBU in Medan City”, Operations Excellence: Journal of Applied Industrial Engineering. Jakarta, Indonesia, 16(2), pp. 123–134. doi: 10.22441/oe.2024.v16.i2.115.