Tangjui, T. ., Sampaothong, P. ., & Limaroon, N. . (2022). The Analysis of COVID-19 impact and the Changes in Revenue Structure of Full Service Carriers: Percentage Change Analysis of Airlines’ Sources of Revenue. Suan Dusit Graduate School Academic Journal, 18(1), 211–230. retrieved from https://so19.tci-thaijo.org/index.php/SDUGSAJ/article/view/237