COMMISSIONER v. SOUTHWEST EXPL. CO.. The Oyez Project at IIT Chicago-Kent College of Law. 13 February 2012. <http://www.oyez.org/cases/1950-1959/1955/1955_286>.
COMMISSIONER v. SOUTHWEST EXPL. CO., The Oyez Project at IIT Chicago-Kent College of Law, http://www.oyez.org/cases/1950-1959/1955/1955_286 (last visited February 13, 2012).
"COMMISSIONER v. SOUTHWEST EXPL. CO.," The Oyez Project at IIT Chicago-Kent College of Law, accessed February 13, 2012, http://www.oyez.org/cases/1950-1959/1955/1955_286.