Chaisanit, . P. ., S. . Sopanik, and P. . Rachapaettayakom. “Enhancing Business Performance Through Innovation: A Study of Day Spas in Thailand”. University of the Thai Chamber of Commerce Journal Humanities and Social Sciences, vol. 45, no. 3, Sept. 2025, pp. 110-33, https://so06.tci-thaijo.org/index.php/utccjournalhs/article/view/286193.