Lietz, Kris, Michael Ginn Lietz, and Nittayanan Natee. “Problems and Proposed Strategies for Solving the English Problems of Thai Staff Working at a European Airline Call Center”. Journal of Buddhist Education and Research (JBER) 12, no. 3 (September 21, 2026): 278–287. accessed September 28, 2026. https://so06.tci-thaijo.org/index.php/jber/article/view/290492.