Pheunpha, P. “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), ปี 18, ฉบับที่ 1, มีนาคม 2023, https://so02.tci-thaijo.org/index.php/BECJournal/article/view/249119.