Lietz K, Lietz MG, Natee N. Problems and Proposed Strategies for Solving the English Problems of Thai Staff Working at a European Airline Call Center. JBER [internet]. 2026 Sep. 21 [cited 2026 Sep. 27];12(3):278-87. available from: https://so06.tci-thaijo.org/index.php/jber/article/view/290492