World Health Organization. Vaccines and Biologicals: Who vaccine-preventable diseases: monitoring system.
Citazione stile Chigago Style (17a edizione)World Health Organization. Vaccines and Biologicals: Who Vaccine-preventable Diseases: Monitoring System.
Citatione MLA (8a ed.)World Health Organization. Vaccines and Biologicals: Who Vaccine-preventable Diseases: Monitoring System.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.