UNITED GAS CO. v. CONTINENTAL OIL CO.. The Oyez Project at IIT Chicago-Kent College of Law. 17 May 2012. <http://www.oyez.org/cases/1960-1969/1964/1964_644>.
UNITED GAS CO. v. CONTINENTAL OIL CO., The Oyez Project at IIT Chicago-Kent College of Law, http://www.oyez.org/cases/1960-1969/1964/1964_644 (last visited May 17, 2012).
"UNITED GAS CO. v. CONTINENTAL OIL CO.," The Oyez Project at IIT Chicago-Kent College of Law, accessed May 17, 2012, http://www.oyez.org/cases/1960-1969/1964/1964_644.