PERKINS v. MATTHEWS. The Oyez Project at IIT Chicago-Kent College of Law. 13 February 2012. <http://www.oyez.org/cases/1970-1979/1970/1970_46>.
PERKINS v. MATTHEWS, The Oyez Project at IIT Chicago-Kent College of Law, http://www.oyez.org/cases/1970-1979/1970/1970_46 (last visited February 13, 2012).
"PERKINS v. MATTHEWS," The Oyez Project at IIT Chicago-Kent College of Law, accessed February 13, 2012, http://www.oyez.org/cases/1970-1979/1970/1970_46.