CASS v. UNITED STATES. The Oyez Project at IIT Chicago-Kent College of Law. 16 May 2012. <http://www.oyez.org/cases/1970-1979/1973/1973_73_604>.
CASS v. UNITED STATES, The Oyez Project at IIT Chicago-Kent College of Law, http://www.oyez.org/cases/1970-1979/1973/1973_73_604 (last visited May 16, 2012).
"CASS v. UNITED STATES," The Oyez Project at IIT Chicago-Kent College of Law, accessed May 16, 2012, http://www.oyez.org/cases/1970-1979/1973/1973_73_604.