Saithong, Atikarn, Jirasuk Suksawat, and Wunlapa Sabaiying. 2019. “The Effects of Using an Integrated Guidance Activities Package to Enhance Child Development Enhancing Behaviors of Parents Whose Children Are Suspected to Have Delayed Development at Tessaban 2 (Wat Payang) School in Chiang Rai Province”. Ph.D. In Social Sciences Journal 9 (3):789-802. https://so05.tci-thaijo.org/index.php/phdssj/article/view/151319.