UNITED STATES v. ZACKS. The Oyez Project at IIT Chicago-Kent College of Law. 13 February 2012. <http://www.oyez.org/cases/1960-1969/1963/1963_44>.
UNITED STATES v. ZACKS, The Oyez Project at IIT Chicago-Kent College of Law, http://www.oyez.org/cases/1960-1969/1963/1963_44 (last visited February 13, 2012).
"UNITED STATES v. ZACKS," The Oyez Project at IIT Chicago-Kent College of Law, accessed February 13, 2012, http://www.oyez.org/cases/1960-1969/1963/1963_44.