Trends in Maternal Mortality: 1990 to 2015. Estimates by WHO, UNICEF, UNFPA, World Bank Group and the United Nations Population Division (pdf) (Maakohtaiset arviot äitiyskuolleisuudesta liitetaulukossa 7 s. 51–57/78 (Annex 7. Estimates of maternal mortality ratio (MMR, maternal deaths per 100 000 live births), number of maternal deaths, lifetime risk, percentage of AIDS-related indirect maternal deaths and proportion of deaths among women of reproductive age that are due to maternal causes (PM), by country, 2015)) 2015. Geneva, Switzerland: Maailman terveysjärjestö, who.int. ISBN 978-924-156514-1 Viitattu 19.1.2017. (englanniksi)
