Não informado. Immunization: Survey of recent research. Center for Disease Control.
Chicago-Zitierstil (17. Ausg.)Não informado. Immunization: Survey of Recent Research. Atlanta, Ga: Center for Disease Control.
MLA-Zitierstil (8. Ausg.)Não informado. Immunization: Survey of Recent Research. Center for Disease Control.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.