Não informado. (1937). Concrete for railways. Portland Cement Association.
Style de citation Chicago (17e éd.)Não informado. Concrete for Railways. Chicago, Ill: Portland Cement Association, 1937.
Style de citation MLA (8e éd.)Não informado. Concrete for Railways. Portland Cement Association, 1937.
Attention : ces citations peuvent ne pas être correctes à 100%.