1. Apple, R. & Golden, J. (1997). Mothers and Motherhood: Readings in American History. Columbus, OH: Ohio State University Press.
2. Bain, Louise. (1993). Fetal Tissue Transplantation in Parkinson's disease. British Journal of Nursing. 2(20). pps. 1012–1015.
3. Bakay, R. (1994). Response to letter, Fetal Tissue Grafting with the Central Nervous System: Yesterday, Today, and Tomorrow. Neurosurgery. 34(6), June. pps. 1101–2.
4. Centers for Disease Control and Prevention. (1999). CDC Surveillance Summaries—MMWR, Abortion Surveillance-1996. 48(SS-4).
5. Centers for Disease Control. (1998). Diabetes Fact Sheet. Retrieved from the World Wide Web, January 12, 2001. http://www.cdc.gov/diabetes/pubs/facts98.htm