Tandatanaya, P. and Boontham, T. (2019) “Happiness in Learning among Pre-cadet Students’ in National Defence Studies Institute”, KASEM BUNDIT JOURNAL, 20(May), pp. 100–110. Available at: https://so04.tci-thaijo.org/index.php/jkbu/article/view/180971 (Accessed: 3 May 2024).