MARYLAND v. WIRTZ. The Oyez Project at IIT Chicago-Kent College of Law. 12 February 2012. <http://www.oyez.org/cases/1960-1969/1967/1967_742>.
MARYLAND v. WIRTZ, The Oyez Project at IIT Chicago-Kent College of Law, http://www.oyez.org/cases/1960-1969/1967/1967_742 (last visited February 12, 2012).
"MARYLAND v. WIRTZ," The Oyez Project at IIT Chicago-Kent College of Law, accessed February 12, 2012, http://www.oyez.org/cases/1960-1969/1967/1967_742.