Puwittayathorn, T. (2019) “Development of Human Resource Competency in Koh Samui District Surat Thani Province”, Parichart Journal, 32(1), pp. 133–150. available at: https://so05.tci-thaijo.org/index.php/parichartjournal/article/view/99150 (accessed: 29 September 2026).