SCHAFFER TRANSP. CO. v. U.S.. The Oyez Project at IIT Chicago-Kent College of Law. 17 May 2012. <http://www.oyez.org/cases/1950-1959/1957/1957_20>.
SCHAFFER TRANSP. CO. v. U.S., The Oyez Project at IIT Chicago-Kent College of Law, http://www.oyez.org/cases/1950-1959/1957/1957_20 (last visited May 17, 2012).
"SCHAFFER TRANSP. CO. v. U.S.," The Oyez Project at IIT Chicago-Kent College of Law, accessed May 17, 2012, http://www.oyez.org/cases/1950-1959/1957/1957_20.