Wongphuka, K., T. Chai-Aroon, S. Phainoi, and P. Boon-Long. “Social Entrepreneur Competencies of Social Activists Involved With Children and Youths: A Case Study of Nan Province, Thailand”. Kasetsart Journal of Social Sciences, vol. 38, no. 2, Apr. 2017, pp. 143-9, https://so04.tci-thaijo.org/index.php/kjss/article/view/242666.