Pheunpha, P. (2023). Personal, Economic, and Societal Factors Affecting the Anxiety of Traders during the COVID-19 Pandemic in the Lower Northeastern Region of Thailand. Journal of Business, Innovation and Sustainability (JBIS), 18(1). สืบค้น จาก https://so02.tci-thaijo.org/index.php/BECJournal/article/view/249119