Thaithong, N., Praneetham, C., Noades, M. and Sitthijirapat, P. (2018) “Competency Development of the Hotel Staff in Koh Samui, Surat Thani Province”, Chophayom Journal, 29(3), pp. 41–54. available at: https://so01.tci-thaijo.org/index.php/ejChophayom/article/view/163906 (accessed: 14 September 2026).