Chantharat, N. ., and S. Chantharat. “The Study of Factor Related to Service Quality That Affect Competitive Advantage of Health Spa Business in Bangkok”. Dusit Thani College Journal, vol. 17, no. 3, Dec. 2023, pp. 177-89, https://so01.tci-thaijo.org/index.php/journaldtc/article/view/268376.