Chaiyo, Ammarawadee, and Tosaporn Sukha. “The Opportunity to Develop East Coast Tourism towards High-Value Tourism According to Happy Model”. Dusit Thani College Journal 16, no. 2 (August 30, 2022): 220–236. Accessed May 2, 2024. https://so01.tci-thaijo.org/index.php/journaldtc/article/view/263135.