UNITED STATES v. UNION PACIFIC R. CO.. The Oyez Project at IIT Chicago-Kent College of Law. 17 May 2012. <http://www.oyez.org/cases/1950-1959/1956/1956_97>.
UNITED STATES v. UNION PACIFIC R. CO., The Oyez Project at IIT Chicago-Kent College of Law, http://www.oyez.org/cases/1950-1959/1956/1956_97 (last visited May 17, 2012).
"UNITED STATES v. UNION PACIFIC R. CO.," The Oyez Project at IIT Chicago-Kent College of Law, accessed May 17, 2012, http://www.oyez.org/cases/1950-1959/1956/1956_97.