คำนวณตา ด., and พิริยสมิทธิ์ ส. “The Collaboration on Tourism Management in Mae Hong Son Province”. RMUTT Global Business and Economics Review, vol. 9, no. 2, Nov. 2014, pp. 151-69, https://so03.tci-thaijo.org/index.php/RMUTT-Gber/article/view/242062.