APA

Ogden B. D., . (2007). Railroad-highway grade crossing handbook. Revised second edition 2007. Washington DC: U.S. Department of Transportation. Federal Highway Administration.

Chicago

Ogden Brent D, . 2007. Railroad-highway grade crossing handbook. Revised second edition 2007. Washington DC: U.S. Department of Transportation. Federal Highway Administration.

Harvard

Ogden B. D., . (2007). Railroad-highway grade crossing handbook. Revised second edition 2007. Washington DC: U.S. Department of Transportation. Federal Highway Administration.

MLA

Ogden Brent D, . Railroad-highway grade crossing handbook. Revised second edition 2007. Washington DC: U.S. Department of Transportation. Federal Highway Administration. 2007.