Varamar, V., C. Bunchapattanasakda, and O. Sawagevudcharee. “Essential Characteristics of Successful SMEs Entrepreneurs in Trade Section in Bangkok”. RMUTL Journal of Business Administration and Liberal Arts, vol. 5, no. 2, June 2017, pp. 124-33, https://so05.tci-thaijo.org/index.php/balajhss/article/view/94753.