1. Canadian Perinatal Health Report, 2008 Edition,2008
2. PRAMS 2002 surveillance report;Williams,2006
3. Listening to Mothers: Report of the First National U.S. Survey of Women’s Childbearing Experiences;Declercq,2002
4. Survey of recent mothers: women’s views and experiences of maternity care;Brown,1997
5. First class delivery: a national survey of women’s views of maternity care;Garcia,1998