APA aipamena

World Health Organization. Vaccines and Biologicals: Who vaccine-preventable diseases: monitoring system.

Chicago Style aipamena

World Health Organization. Vaccines and Biologicals: Who Vaccine-preventable Diseases: Monitoring System.

MLA aipamena

World Health Organization. Vaccines and Biologicals: Who Vaccine-preventable Diseases: Monitoring System.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.