Chaleomklin, P. “The Causal Relationship of Satisfaction Affecting Customer Loyalty of Spa and Massage in Kanchanaburi Province”. Journal of Multidisciplinary in Humanities and Social Sciences, vol. 7, no. 2, Apr. 2024, pp. 1059-80, https://so04.tci-thaijo.org/index.php/jmhs1_s/article/view/270554.