World Health Organization. Vaccines and Biologicals: Who vaccine-preventable diseases: monitoring system.
Citação do estilo Chicago (17ª ed.)World Health Organization. Vaccines and Biologicals: Who Vaccine-preventable Diseases: Monitoring System.
Citação MLA (8ª ed.)World Health Organization. Vaccines and Biologicals: Who Vaccine-preventable Diseases: Monitoring System.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.