(2000). Registered live births in the Philippines: 1997. NSO Special Release.
Chicago Style aipamena"Registered Live Births in the Philippines: 1997." NSO Special Release 2000.
MLA aipamena"Registered Live Births in the Philippines: 1997." NSO Special Release, 2000.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.