Sanguansak Rerksuppaphol และ Lakkana Vichaichalermwong. (2004) Normal anal position in Thai newborn infants: A preliminary report. <i>Journal of Medicine and Health Sciences</i>, <i>11</i>(3), 20-25.Sanguansak Rerksuppaphol และ Lakkana Vichaichalermwong. "Normal anal position in Thai newborn infants: A preliminary report". Journal of Medicine and Health Sciences 11 (2004):20-25.Sanguansak Rerksuppaphol และ Lakkana Vichaichalermwong. Normal anal position in Thai newborn infants: A preliminary report. Faculty of Medicine,Srinakharinwirot University:ม.ป.ท. 2004.