Kue-iad, Nuengruetai, Jirapong Sangthong, Bhunyabhadh Chaimay, and Somkiattiyos Woradet. 2019. “Prevalence of Child Development Delay Among Children Aged under 5 Years Old in Phatthalung Province”. Journal of Health Science of Thailand 28 (2):215-23. https://thaidj.org/index.php/JHS/article/view/6413.