Duangkamol Pongphankae ดวงกมล ผ่องพรรณแข, and Thirawat Chantuk ธีระวัฒน์ จันทึก. “The Development of Hotel Operating System by Creative Innovation to Promote Health Tourism in the Future”. Dusit Thani College Journal 12, no. 1 (April 4, 2018): 88–102. Accessed May 24, 2024. https://so01.tci-thaijo.org/index.php/journaldtc/article/view/117932.