Ponyiam, W. and Lengvithaya, C. (2021) “The Development of Tourism and Tour Guides Laws Under the Tourism Business and Guide Act B.E. 2551”, Ph.D. in Social Sciences Journal, 11(2), pp. 283–294. Available at: https://so05.tci-thaijo.org/index.php/phdssj/article/view/193418 (Accessed: 27 April 2024).