Luekveerawattana, R., and S. Rimdusit. “Guidelines for the Development of Green Tourism Route in Wang Yai Village, Nhongkungtubmah Sub-District, Wangsammor District, Udon Thani Province”. Journal of Thai Hospitality and Tourism, vol. 19, no. 1, Jan. 2024, pp. 19-29, https://so04.tci-thaijo.org/index.php/tourismtaat/article/view/259327.