Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.