WyckoffD. D., & LovelockC. (2001). A Cornell quarterly classic: New tools for achieving service quality. Cornell Hospitality Quarterly, 42(4), 25.
2.
ZeithamlV. A., BitnerM. J., GremlerD. D., & PanditaA. (2013). Services marketing: Integrating customer focus across the firm. New Delhi: McGraw Hill Education.