Srikhwan, Boonnawat, and Watsida Boonyanmethaporn. “Secondary Airport Management Guidelines to Service Quality Elevation of Secondary Airport in the Southern Provinces, Thailand”. Dusit Thani College Journal 14, no. 3 (December 30, 2020): 34–50. Accessed May 19, 2024. https://so01.tci-thaijo.org/index.php/journaldtc/article/view/245490.