sangaroon, Chanpen. “A LEARNING DESIGN TO DEVELOP 21st CENTURY LEARNING SKILLS FOR STUDENTS OF NAKHON RATCHASIMA RAJABHAT UNIVERSITY”. Research Community and Social Development Journal 15, no. 3 (August 17, 2021): 80–90. accessed October 10, 2026. https://so04.tci-thaijo.org/index.php/NRRU/article/view/246130.