Chaichatchawalprateep, T., and C. Na Thalang. “The Integrated Strategy for the Development of Sustainable Tourism to Maintain the Tourist Destination of Hua-Hin District, Prachuap Khiri Khan”. Rajamangala University of Technology Tawan-Ok Social Science Journal, vol. 9, no. 2, Dec. 2020, pp. 28-39, https://so05.tci-thaijo.org/index.php/SocialJournal2rmutto/article/view/242170.