World Health Organization. Safe motherhood Care in normal birth: A practical guide. World Health Organization.
Chicago-Zitierstil (17. Ausg.)World Health Organization. Safe Motherhood Care in Normal Birth: A Practical Guide. Geneva: World Health Organization.
MLA-Zitierstil (8. Ausg.)World Health Organization. Safe Motherhood Care in Normal Birth: A Practical Guide. World Health Organization.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.