UNITED STATES v. POWELL. The Oyez Project at IIT Chicago-Kent College of Law. 13 February 2012. <http://www.oyez.org/cases/1960-1969/1964/1964_54>.
UNITED STATES v. POWELL, The Oyez Project at IIT Chicago-Kent College of Law, http://www.oyez.org/cases/1960-1969/1964/1964_54 (last visited February 13, 2012).
"UNITED STATES v. POWELL," The Oyez Project at IIT Chicago-Kent College of Law, accessed February 13, 2012, http://www.oyez.org/cases/1960-1969/1964/1964_54.