Srichanthawong, Payungporn, Arinchai Hamanee, and Phompong Mahapornphom. 2020. “The Development of Cultural Ecotourism Efficiency of Phu Tao Pong, Ban Bung Kum, Na Ho Sub-District, Dansai District, Loei Province”. Research and Development Journal, Loei Rajabhat University 15 (51):33-43. https://so05.tci-thaijo.org/index.php/researchjournal-lru/article/view/233533.