“Customer Loyalty in the Fitness Club Industry: The Role of Club Communication, Customer Expectation, and Perceived Service Quality”, GJMBR, vol. 23, no. E1, pp. 55–76, May 2023, Accessed: Feb. 04, 2026. [Online]. Available: https://testing.journalofbusiness.org/index.php/GJMBR/article/view/102801