ทรัพย์สมบูรณ์ ยุลดา, and ภัทรภิญโญพงศ์ วริยา. 2019. “An Examination of Major Tourist Attractions in Chai Nat Province to Provide Information for Creating Tourism Added Value”. Liberal Arts Review 14 (2):1-14. https://so04.tci-thaijo.org/index.php/larhcu/article/view/228894.