Pattaratuma, A., and C. Nantawong. “Tourists’ Opinion on Conservation Tourism Development Center Project at Jet Khot-Pong Konsao Forest Plantation, Kaeng Khoi District, Saraburi Province”. Kasetsart Journal of Social Sciences, vol. 30, no. 1, Apr. 2009, pp. 60-66, https://so04.tci-thaijo.org/index.php/kjss/article/view/246488.