PORTER CO. v. CENTRAL VERMONT R. CO.. The Oyez Project at IIT Chicago-Kent College of Law. 12 February 2012. <http://www.oyez.org/cases/1960-1969/1960/1960_257>.
PORTER CO. v. CENTRAL VERMONT R. CO., The Oyez Project at IIT Chicago-Kent College of Law, http://www.oyez.org/cases/1960-1969/1960/1960_257 (last visited February 12, 2012).
"PORTER CO. v. CENTRAL VERMONT R. CO.," The Oyez Project at IIT Chicago-Kent College of Law, accessed February 12, 2012, http://www.oyez.org/cases/1960-1969/1960/1960_257.