World Health Organization. Safe motherhood Care in normal birth: A practical guide. World Health Organization.
Цитирование в стиле Чикаго (17-е изд.)World Health Organization. Safe Motherhood Care in Normal Birth: A Practical Guide. Geneva: World Health Organization.
Цитирование MLA (8-е изд.)World Health Organization. Safe Motherhood Care in Normal Birth: A Practical Guide. World Health Organization.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.