1. Human Embryology: Prenatal Development of Form and Function;Hamilton,1952
2. Color Atlas of Embryology;Drews,1995
3. Hill, M. UNSW Embryology, 2004. www.med.nc.edu/embryology/contents/htm.
4. Small and Large Intestines;Passarge,2006
5. Smith‘s Recognizable Patterns of Malformation;Jones,2006