NATIONAL LEAD CO. v. COMMISSIONER. The Oyez Project at IIT Chicago-Kent College of Law. 26 April 2013. <http://www.oyez.org/cases/1950-1959/1956/1956_124>.
NATIONAL LEAD CO. v. COMMISSIONER, The Oyez Project at IIT Chicago-Kent College of Law, http://www.oyez.org/cases/1950-1959/1956/1956_124 (last visited April 26, 2013).
"NATIONAL LEAD CO. v. COMMISSIONER," The Oyez Project at IIT Chicago-Kent College of Law, accessed April 26, 2013, http://www.oyez.org/cases/1950-1959/1956/1956_124.