Kancwamdee, C., and S. Sutthibodee. “The Liabilities of Airlines in Case of Passengers Have Been Infected by COVID-19 on Board”. Ph.D. in Social Sciences Journal, vol. 13, no. 1, Apr. 2023, pp. 44-59, https://so05.tci-thaijo.org/index.php/phdssj/article/view/255012.