Chaikoolvatana, A. ., . S. . Moolasarn, and N. Ratanadet. “Stress and Coping Behavior of Out-Patients in Yasothon Province”. Siriraj Medical Journal, vol. 57, no. 12, Dec. 2005, pp. 541-6, https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/245659.