(1999). Registered live births in the Philippines: 1997. NSO Monthly Bulletin Statistics.
Chicago Style aipamena"Registered Live Births in the Philippines: 1997." NSO Monthly Bulletin Statistics 1999.
MLA aipamena"Registered Live Births in the Philippines: 1997." NSO Monthly Bulletin Statistics, 1999.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.