John M. Harlan. The Oyez Project at IIT Chicago-Kent College of Law. 13 February 2012. <http://www.oyez.org/justices/john_m_harlan2&sub=opinions/1957>.
John M. Harlan, The Oyez Project at IIT Chicago-Kent College of Law, http://www.oyez.org/justices/john_m_harlan2&sub=opinions/1957 (last visited February 13, 2012).
"John M. Harlan," The Oyez Project at IIT Chicago-Kent College of Law, accessed February 13, 2012, http://www.oyez.org/justices/john_m_harlan2&sub=opinions/1957.