David Boothroyd, Politico's guide to the history of British political parties, p. 138
Oxford Dictionary of National Biography 2005-2008, Lawrence Goldman, OUP Oxford, 2013, page 376 https://books.google.com/books?id=nbGcAQAAQBAJ&dq=%22two+one-man+parties+had+become+one+two-man+party%22&pg=PA376
Michael A. Murphy, Gerry Fitt: A Political Chameleon, p.162
Eamonn McCann, "Obituary: Paddy Kennedy Archived 2014-07-15 at the Wayback Machine", The Guardian, 4 May 1999 /wiki/Eamonn_McCann