Boonurai, S. . “THE EFFECT OF OUTDOOR ACTIVITIES ON SOCIAL BEHAVIOR OF PRESCHOOL CHILDREN AT BANNONGSUECHANG SCHOOL”. Journal of Yanasangvorn Research Institute Mahamakut Buddhist University, vol. 11, no. 1, June 2020, pp. 24-31, https://so04.tci-thaijo.org/index.php/yri/article/view/244025.