COMMISSIONER OF INTERNAL REVENUE v. ACKER. The Oyez Project at IIT Chicago-Kent College of Law. 17 May 2012. <http://www.oyez.org/cases/1950-1959/1959/1959_13>.
COMMISSIONER OF INTERNAL REVENUE v. ACKER, The Oyez Project at IIT Chicago-Kent College of Law, http://www.oyez.org/cases/1950-1959/1959/1959_13 (last visited May 17, 2012).
"COMMISSIONER OF INTERNAL REVENUE v. ACKER," The Oyez Project at IIT Chicago-Kent College of Law, accessed May 17, 2012, http://www.oyez.org/cases/1950-1959/1959/1959_13.