1. Joint policy statement on normal childbirth;Society of Obstetricians and Gynaecologists of Canada, AWHONN Canada, Canadian Association of Midwives;J Obstet Gynaecol Can,2008
2. Maternity Care Working Party Making Normal Birth a Reality. Consensus Statement from the Maternity Care Working Party: Our Shared Views About the Need To Recognise, Facilitate and Audit Normal Birth National Childbirth Trust; Royal College of Midwives; Royal College of Obstetricians and Gynaecologists 2007 http://www.appg-maternity.org.uk/resources/NormalBirthConsensusStatementNEWLOGO.pdf