ล่องประเสริฐ ส. Development of Spa Business Standard in Koh Samui Suratthani to Asean Economic Community. Journal of Management Sciences [internet]. 2018 Oct. 11 [cited 2026 Sep. 11];1(1):125-42. available from: https://so03.tci-thaijo.org/index.php/msj/article/view/150216