UNITED STATES v. CHAS. PFIZER & CO., INC.. The Oyez Project at IIT Chicago-Kent College of Law. 13 February 2012. <http://www.oyez.org/cases/1970-1979/1971/1971_70_72>.
UNITED STATES v. CHAS. PFIZER & CO., INC., The Oyez Project at IIT Chicago-Kent College of Law, http://www.oyez.org/cases/1970-1979/1971/1971_70_72 (last visited February 13, 2012).
"UNITED STATES v. CHAS. PFIZER & CO., INC.," The Oyez Project at IIT Chicago-Kent College of Law, accessed February 13, 2012, http://www.oyez.org/cases/1970-1979/1971/1971_70_72.