World Health Organization. Safe motherhood Care in normal birth: A practical guide. World Health Organization.
Cita Chicago (17th ed.)World Health Organization. Safe Motherhood Care in Normal Birth: A Practical Guide. Geneva: World Health Organization.
Cita MLA (8th ed.)World Health Organization. Safe Motherhood Care in Normal Birth: A Practical Guide. World Health Organization.
Atenció: Aquestes cites poden no estar 100% correctes.