PENNSYLVANIA v. NEW YORK. The Oyez Project at IIT Chicago-Kent College of Law. 13 February 2012. <http://www.oyez.org/cases/1970-1979/1971/1971_40_orig>.
PENNSYLVANIA v. NEW YORK, The Oyez Project at IIT Chicago-Kent College of Law, http://www.oyez.org/cases/1970-1979/1971/1971_40_orig (last visited February 13, 2012).
"PENNSYLVANIA v. NEW YORK," The Oyez Project at IIT Chicago-Kent College of Law, accessed February 13, 2012, http://www.oyez.org/cases/1970-1979/1971/1971_40_orig.