World Health Organization. Vaccines and Biologicals: Who vaccine-preventable diseases: monitoring system.
Čikaški stil citiranja (17. izdanje)World Health Organization. Vaccines and Biologicals: Who Vaccine-preventable Diseases: Monitoring System.
MLA način citiranja (8. izdanje)World Health Organization. Vaccines and Biologicals: Who Vaccine-preventable Diseases: Monitoring System.
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