NORTHERN PAC. R. CO. v. UNITED STATES. The Oyez Project at IIT Chicago-Kent College of Law. 17 May 2012. <http://www.oyez.org/cases/1950-1959/1957/1957_59>.
NORTHERN PAC. R. CO. v. UNITED STATES, The Oyez Project at IIT Chicago-Kent College of Law, http://www.oyez.org/cases/1950-1959/1957/1957_59 (last visited May 17, 2012).
"NORTHERN PAC. R. CO. v. UNITED STATES," The Oyez Project at IIT Chicago-Kent College of Law, accessed May 17, 2012, http://www.oyez.org/cases/1950-1959/1957/1957_59.