PUTNAM v. COMMISSIONER. The Oyez Project at IIT Chicago-Kent College of Law. 17 May 2012. <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 May 17, 2012).
"PUTNAM v. COMMISSIONER," The Oyez Project at IIT Chicago-Kent College of Law, accessed May 17, 2012, http://www.oyez.org/cases/1950-1959/1956/1956_25.