Chanthakol, P. “Entrepreneurial Characteristics Affecting the Success of Service Businesses in Tourism Industry of Entrepreneurs in Khon Kaen Municipality, Thailand”. Asian Interdisciplinary and Sustainability Review, vol. 8, no. 2, July 2019, pp. 171-9, https://so05.tci-thaijo.org/index.php/PSAKUIJIR/article/view/242931.