Saxena, Ritu, and Rajesh Sharma. “Service Marketing Mix: A Critical Review”. Journal of Advanced Research in Operational and Marketing Management 1, no. 1 (December 12, 2018): 27-31. Accessed April 4, 2025. https://adrjournalshouse.com/index.php/Journal-OperationalMarketing-Mgt/article/view/523.