APA(7版)引用形式

Não informado. (1937). Concrete for railways. Portland Cement Association.

Chicagoスタイル(17版)引用形式

Não informado. Concrete for Railways. Chicago, Ill: Portland Cement Association, 1937.

MLA(8版)引用形式

Não informado. Concrete for Railways. Portland Cement Association, 1937.

警告: この引用は必ずしも正確ではありません.