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2. Women’s Experiences of Maternity Care in the NHS in England: Key Findings from a Survey of NHS Trusts Carried Out in 2007;Healthcare Commission,2007
3. Saving Mothers’ Lives: Reviewing Maternal Deaths to Make Motherhood Safer 2003–2005. The Seventh Report of the Confidential Enquiries into Maternal Deaths in the United Kingdom,2007
4. NHS Litigation Authority, 2010/11. Clinical Negligence Scheme for Trusts: Maternity Clinical Risk Management Standards Version 1. 〈www.nhsla.com/News/#{A0A8EE5C-A421-4925-AD44-6DF4E3ED8DDC}〉.
5. Office for National Statistics, 2009. Statistical Bulletin: Infant and Perinatal Mortality 2008: Health Areas, England and Wales. 〈http://www.statistics.gov.uk/pdfdir/ipm0909.pdf〉.