(2016). Global, regional, and national levels of maternal mortality, 1990–2015: A systematic analysis for the Global Burden of Disease Study 2015. Lancet.
Chicago Style aipamena"Global, Regional, and National Levels of Maternal Mortality, 1990–2015: A Systematic Analysis for the Global Burden of Disease Study 2015." Lancet 2016.
MLA aipamena"Global, Regional, and National Levels of Maternal Mortality, 1990–2015: A Systematic Analysis for the Global Burden of Disease Study 2015." Lancet 2016.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.