APA

Departament of Health and Human Services (washington U., .CDC on vaccines and children's health: United States 1900-98. : .

Chicago

Departament of Health and Human Services (washington Us), .CDC on vaccines and children's health: United States 1900-98. : .

Harvard

Departament of Health and Human Services (washington U., .CDC on vaccines and children's health: United States 1900-98. : .

MLA

Departament of Health and Human Services (washington Us), .: . .