ศักดิ์สง่าวงษ์ ส. “Risk factors and risk scores of cesarean delivery due to cephalopelvic disproportion at Kumpawapi Hospital”. Journal of Medicine and Health Sciences, vol. 25, no. 2, Aug. 2018, pp. 30-42, https://he01.tci-thaijo.org/index.php/jmhs/article/view/142878.