PUTNAM v. COMMISSIONER. The Oyez Project at IIT Chicago-Kent College of Law. 27 April 2013. <http://www.oyez.org/cases/1950-1959/1956/1956_25>.
PUTNAM v. COMMISSIONER, The Oyez Project at IIT Chicago-Kent College of Law, http://www.oyez.org/cases/1950-1959/1956/1956_25 (last visited April 27, 2013).
"PUTNAM v. COMMISSIONER," The Oyez Project at IIT Chicago-Kent College of Law, accessed April 27, 2013, http://www.oyez.org/cases/1950-1959/1956/1956_25.