PANAMA REFINING CO. v. RYAN. The Oyez Project at IIT Chicago-Kent College of Law. 19 May 2013. <http://www.oyez.org/cases/1901-1939/1934/1934_135>.
PANAMA REFINING CO. v. RYAN, The Oyez Project at IIT Chicago-Kent College of Law, http://www.oyez.org/cases/1901-1939/1934/1934_135 (last visited May 19, 2013).
"PANAMA REFINING CO. v. RYAN," The Oyez Project at IIT Chicago-Kent College of Law, accessed May 19, 2013, http://www.oyez.org/cases/1901-1939/1934/1934_135.