Ngampiriyakorn, G., Thammawiwat, N. . and Kwalamthan, W. . (2022) “The Development of Element’s Happiness in Ongkharak Demonstration School, Srinakharinwirot University”, Interdisciplinary Academic and Research Journal , 2(5), pp. 461–480. doi: 10.14456/iarj.2022.107.