1. Crossing the quality of chasm: a new health system for the 21st century,2002
2. National Institute for Clinical Excellence. Antenatal care: routine care for the healthy pregnant woman. National Collaborating Centre for Women’s and Children’s Health. Available at: www.nice.org.uk. Accessed October 4, 2006.
3. Caring for our future: the content of prenatal care,1989
4. Infant death: an analysis by maternal risk and heath care;Kessner,1973
5. An evaluation of the Kessner Adequacy of Prenatal Care Index and a proposed adequacy of prenatal care utilization index;Kotelchuck;Am J Public Health,1994