S. Piriyakoontorn, K. Balthip, U. Petchruschatachart, and N. Tiraphat, “Developing a Model for Enhancing the Goodness , Smartness and Happiness of Thai Primary School Students in Songkhla Province: A Participation Action Research Study”, JRN-MHS, vol. 36, no. 3, pp. 150–171, Dec. 2016.