เลิศหัตถศิลป์ ต., and ชื่นสุวรรณ อ. “Use of the Pervasive Developmental Disorders Screening Instrument in Children With Delayed Speech”. Journal of the Psychiatric Association of Thailand, vol. 64, no. 3, Sept. 2019, pp. 209-16, https://he01.tci-thaijo.org/index.php/JPAT/article/view/218435.