Pruktarat, W. ., T. . Prasopkittikun, Y. . Sitthimongkol, and N. . Vongsirimas. “Factors Influencing Family Functioning Related to Preschool Children With Down Syndrome”. Pacific Rim International Journal of Nursing Research, vol. 25, no. 4, Sept. 2021, pp. 587-99, https://he02.tci-thaijo.org/index.php/PRIJNR/article/view/253361.