Prakobkandee, Nutthapong. “An Analysis on the Strategic Challenges of Airline Alliance and Unaligned Airlines in the Airline Business”. Executive Journal 35, no. 2 (July 29, 2015): 20–32. Accessed May 7, 2024. https://so01.tci-thaijo.org/index.php/executivejournal/article/view/81297.