Chao Atikarn Roongroj Adhipanño, and PhrakruKanlayanakittiwatan. “THE DEVELOPMENT OF TOURISM RESOURCES IN UTTARADIT PROVINCE”. Journal of Liberal Art of Rajamangala University of Technology Suvarnabhumi 1, no. 2 (December 13, 2019): 125–140. Accessed April 17, 2024. https://so03.tci-thaijo.org/index.php/art/article/view/240449.