Ongkhluap, S., and S. Chotmanakul. “The Development of Tourism Activities at Elephant Camps in Chiang Mai Province”. KKBS Journal of Business Administration and Accountancy, vol. 8, no. 2, May 2024, pp. 40-58, https://so04.tci-thaijo.org/index.php/kkbsjournal/article/view/271422.