ILLINOIS v. MICHIGAN. The Oyez Project at IIT Chicago-Kent College of Law. 13 February 2012. <http://www.oyez.org/cases/1950-1959/1958/1958_15_orig>.
ILLINOIS v. MICHIGAN, The Oyez Project at IIT Chicago-Kent College of Law, http://www.oyez.org/cases/1950-1959/1958/1958_15_orig (last visited February 13, 2012).
"ILLINOIS v. MICHIGAN," The Oyez Project at IIT Chicago-Kent College of Law, accessed February 13, 2012, http://www.oyez.org/cases/1950-1959/1958/1958_15_orig.