สุนทราเมธากุล อ., ปรมัตถ์วรโชติ ภ. and อดทน อ. (2019) “The Participation in Business of Natural Tourism Community in Pho Sai District, Ubon Ratchathani Province”, Journal of Graduate School, Pitchayatat, Ubon Ratchathani Rajabhat University, 14(1), pp. 182–193. Available at: https://so02.tci-thaijo.org/index.php/Pitchayatat/article/view/221617 (Accessed: 2 May 2024).