Chaimay, B., S. Woradet, C. Noorod, N. Kue-iad, S. Rukleng, and P. Muttarat. “Risk of Teenage Pregnancy and Birth Asphyxia in Bangkeaw District, Phatthalung Province”. Journal of Health Science of Thailand, vol. 25, no. 4, Nov. 2017, pp. 641-9, https://thaidj.org/index.php/JHS/article/view/341.