Noknoi, C., and W. Boripunt. “Communication Effectiveness of the Center for COVID-19 Situation Administration (CCSA)”. Economics and Business Administration Journal Thaksin University, vol. 13, no. 2, July 2021, pp. 123-44, https://so01.tci-thaijo.org/index.php/ecbatsu/article/view/246195.