(1999). Registered live births in the Philippines: 1997. NSO Monthly Bulletin Statistics.
芝加哥风格引文"Registered Live Births in the Philippines: 1997." NSO Monthly Bulletin Statistics 1999.
MLA引文"Registered Live Births in the Philippines: 1997." NSO Monthly Bulletin Statistics, 1999.
警告：这些引文格式不一定是100％准确.