World Health Organization. Safe motherhood Care in normal birth: A practical guide. World Health Organization.
Citazione stile Chigago Style (17a edizione)World Health Organization. Safe Motherhood Care in Normal Birth: A Practical Guide. Geneva: World Health Organization.
Citatione MLA (8a ed.)World Health Organization. Safe Motherhood Care in Normal Birth: A Practical Guide. World Health Organization.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.