SCHAFFER TRANSP. CO. v. U.S.. The Oyez Project at IIT Chicago-Kent College of Law. 27 April 2013. <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 April 27, 2013).
"SCHAFFER TRANSP. CO. v. U.S.," The Oyez Project at IIT Chicago-Kent College of Law, accessed April 27, 2013, http://www.oyez.org/cases/1950-1959/1957/1957_20.