Krueboon K, Namnil P, Pangpongma P, Sukkasem R, Phetrak N, Phutiariyawat J. King Rama IX’s wisdom to develop the skills of the 21st century learner. HUSO-J [internet]. 2021 Jun. 30 [cited 2025 Apr. 10];11(1):45-58. available from: https://so07.tci-thaijo.org/index.php/HUSO-J/article/view/1030