Não informado. Immunization: Survey of recent research. Center for Disease Control.
Chicago-referens (17:e uppl.)Não informado. Immunization: Survey of Recent Research. Atlanta, Ga: Center for Disease Control.
MLA-referens (8:e uppl.)Não informado. Immunization: Survey of Recent Research. Center for Disease Control.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.