Srisakun , Chakrit, Watit Intuluck, and Phopdech Rattanataworn. 2020. “Analyzing the Attractiveness of Luxury Spa in Thailand”. Dusit Thani College Journal 13 (1):415-26. https://so01.tci-thaijo.org/index.php/journaldtc/article/view/241037.