CASCADE NAT. GAS v. EL PASO NAT. GAS. The Oyez Project at IIT Chicago-Kent College of Law. 17 May 2012. <http://www.oyez.org/cases/1960-1969/1966/1966_4>.
CASCADE NAT. GAS v. EL PASO NAT. GAS, The Oyez Project at IIT Chicago-Kent College of Law, http://www.oyez.org/cases/1960-1969/1966/1966_4 (last visited May 17, 2012).
"CASCADE NAT. GAS v. EL PASO NAT. GAS," The Oyez Project at IIT Chicago-Kent College of Law, accessed May 17, 2012, http://www.oyez.org/cases/1960-1969/1966/1966_4.