Wattanavorakijkul N. Challenges Faced by Thai Tertiary Teachers in Designing and Delivering English Courses in the 21st Century. TJ [internet]. 2019 Jun. 11 [cited 2026 Oct. 2];32(1):33-54. available from: https://so05.tci-thaijo.org/index.php/thaitesoljournal/article/view/193955