Prathumthin, S. ., N. T. . Phongkhieo, and T. . Nieamsup. “Recreation Conflicts in National Parks and Coping Behaviors of Park Visitors”. Kasetsart Journal of Social Sciences, vol. 42, no. 2, Apr. 2021, pp. 415-20, https://so04.tci-thaijo.org/index.php/kjss/article/view/250930.