Não informado. (1971). Leptospirosis surveillance. Center for Disease Control.
Chicagoスタイル(17版)引用形式Não informado. Leptospirosis Surveillance. Atlanta, Ga: Center for Disease Control, 1971.
MLA(8版)引用形式Não informado. Leptospirosis Surveillance. Center for Disease Control, 1971.
警告: この引用は必ずしも正確ではありません.