SINGER v. UNITED STATES. The Oyez Project at IIT Chicago-Kent College of Law. 26 April 2013. <http://www.oyez.org/cases/1960-1969/1964/1964_42>.
SINGER v. UNITED STATES, The Oyez Project at IIT Chicago-Kent College of Law, http://www.oyez.org/cases/1960-1969/1964/1964_42 (last visited April 26, 2013).
"SINGER v. UNITED STATES," The Oyez Project at IIT Chicago-Kent College of Law, accessed April 26, 2013, http://www.oyez.org/cases/1960-1969/1964/1964_42.