World Health Organization. (1999). Reduction of maternal mortality. World health Organization.
Chicago-referens (17:e uppl.)World Health Organization. Reduction of Maternal Mortality. Geneva: World health Organization, 1999.
MLA-referens (8:e uppl.)World Health Organization. Reduction of Maternal Mortality. World health Organization, 1999.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.