APA

Ketchum M. S., . (1920). The design of highway bridges of steel, timber and concrete. New York: McGraw-Hill.

Chicago

Ketchum Milo S, . 1920. The design of highway bridges of steel, timber and concrete. New York: McGraw-Hill.

Harvard

Ketchum M. S., . (1920). The design of highway bridges of steel, timber and concrete. New York: McGraw-Hill.

MLA

Ketchum Milo S, . The design of highway bridges of steel, timber and concrete. New York: McGraw-Hill. 1920.