Chaksomsak, Natsariya, Jintana Sarayuthpitak, and Shotiga Pasiphol. 2020. “DEVELOPMENT OF UNIVERSITY STUDENTS’ HAPPINESS ENHANCEMENT PROGRAM”. Academic Journal of Thailand National Sports University 13 (1). Chonburi, Thailand:200-214. https://he02.tci-thaijo.org/index.php/TNSUJournal/article/view/248393.