Muangsornkhiaw, Nitikorn, Attama Nilnoppakun, and Narin Sungrugsa. “Cross- Border Tourism Development Strategy for Dan Singkhon, Prachaup Khiri Khan Province”. WMS Journal of Management 7, no. 3 (September 24, 2018): 27–40. Accessed April 18, 2024. https://so06.tci-thaijo.org/index.php/wms/article/view/147017.