APA (7th ed.) Citation

Association of American Railroads. Economics and Finance Dept, United States. Interstate Commerce Commission, & Association of American Railroads. Economics and Finance Dept. Statistics of railroads of class I in the United States: Statistical summary. Association of American Railroads, Economics and Finance Dept.

Chicago Style (17th ed.) Citation

Association of American Railroads. Economics and Finance Dept, United States. Interstate Commerce Commission, and Association of American Railroads. Economics and Finance Dept. Statistics of Railroads of Class I in the United States: Statistical Summary. Washington,: Association of American Railroads, Economics and Finance Dept.

MLA (8th ed.) Citation

Association of American Railroads. Economics and Finance Dept, et al. Statistics of Railroads of Class I in the United States: Statistical Summary. Association of American Railroads, Economics and Finance Dept.