Mooncome, O., and C. Na Thalang. “A Study of Tourism Potential in the Special Economic Development Zone, Nakhon Phanom Province”. Rajamangala University of Technology Tawan-Ok Social Science Journal, vol. 9, no. 1, June 2020, pp. 134-42, https://so05.tci-thaijo.org/index.php/SocialJournal2rmutto/article/view/243840.