Suphap, Napatkamon. “Risk Factors of Teenage Pregnancy on Birth Asphyxia at Phetchabun Hospital”. Phetchabun Medical Journal 5, no. 2 (May 15, 2026): 25–34. accessed September 23, 2026. https://he03.tci-thaijo.org/index.php/PMJ/article/view/3884.