World Health Organization. Neonatal and Perinatal Mortality: Country, regional and global estimates.
芝加哥风格引文World Health Organization. Neonatal and Perinatal Mortality: Country, Regional and Global Estimates.
MLA引文World Health Organization. Neonatal and Perinatal Mortality: Country, Regional and Global Estimates.
警告：这些引文格式不一定是100％准确.