INDEPENDENT PETROLEUM WORKERS, AMERICA, v. AMERICAN OIL. The Oyez Project at IIT Chicago-Kent College of Law. 27 April 2013. <http://www.oyez.org/cases/1960-1969/1964/1964_55>.
INDEPENDENT PETROLEUM WORKERS, AMERICA, v. AMERICAN OIL, The Oyez Project at IIT Chicago-Kent College of Law, http://www.oyez.org/cases/1960-1969/1964/1964_55 (last visited April 27, 2013).
"INDEPENDENT PETROLEUM WORKERS, AMERICA, v. AMERICAN OIL," The Oyez Project at IIT Chicago-Kent College of Law, accessed April 27, 2013, http://www.oyez.org/cases/1960-1969/1964/1964_55.