Graham Watson Papers. (PDF) Historisches Archiv der Europäischen Union, Mai 2017, S. 4, abgerufen am 20. September 2017 (englisch): „From 2002–2009, Watson served as President of the European Liberal Democrat and Reform Party (ELDR), and from 2011-2015 was President of the Alliance of Liberals and Democrats for Europe Party (ALDE).“