Phatinuwat, M. (2019) “21st Century Skills and the 21st Century Skills’ Integration into the English for Aviation Course”, NKRAFA Journal of Humanities and Social Sciences, 7, pp. 34–42. available at: https://so04.tci-thaijo.org/index.php/KANNICHA/article/view/218391 (accessed: 24 September 2026).