Thongrungruengchai, Naruechit, and Pannee Banchonhattakit. 2013. “Factors Related With the Parents’ Behavior of Helping Their Children Aged 1-5 Years Old in Brushing Teeth, in Nonsang District, Nhongbualumphu Province”. Srinagarind Medical Journal 28 (1):16-22. https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/11087.