Nakaray, P., C. Rodyoo, and P. Kuenui. “Assessment of the Tourism Potential of Nopphitam District Based on Community-Based Tourism Standard”. University of the Thai Chamber of Commerce Journal Humanities and Social Sciences, vol. 40, no. 2, June 2020, pp. 118-31, https://so06.tci-thaijo.org/index.php/utccjournalhs/article/view/240435.