Udomthanasansakul, P. “The The Influences of Government Policies and Crisis Management on Business Operation of Small and Medium Enterprises in Service Sector in Chiang Mai Province During the Crisis of the COVID-19 Epidemic”. Journal of Accountancy and Management, vol. 13, no. 2, June 2021, pp. 75-92, https://so02.tci-thaijo.org/index.php/mbs/article/view/249076.