Maisook, P., T. Sumalrote, and K. Nopmaneejumruslers. “A Pilot Study of DIR/Floortime Developmental Intervention Program in Children With Developmental Delay”. Vajira Nursing Journal, vol. 21, no. 2, Aug. 2019, pp. 1-11, https://he02.tci-thaijo.org/index.php/vnj/article/view/179463.