"European election 13 June 1999". historiaelectoral.com (in Spanish). Electoral History. Archived from the original on 3 September 2016. Retrieved 24 September 2017.
"European election 13 June 2004". historiaelectoral.com (in Spanish). Electoral History. Archived from the original on 16 September 2017. Retrieved 24 September 2017.
"European election 7 June 2009". historiaelectoral.com (in Spanish). Electoral History. Archived from the original on 24 September 2017. Retrieved 24 September 2017.
"European election 25 May 2014". historiaelectoral.com (in Spanish). Electoral History. Archived from the original on 24 September 2017. Retrieved 24 September 2017.
"European election 13 June 1999". historiaelectoral.com (in Spanish). Electoral History. Archived from the original on 3 September 2016. Retrieved 24 September 2017.
"European election 13 June 2004". historiaelectoral.com (in Spanish). Electoral History. Archived from the original on 16 September 2017. Retrieved 24 September 2017.
"European election 7 June 2009". historiaelectoral.com (in Spanish). Electoral History. Archived from the original on 24 September 2017. Retrieved 24 September 2017.
"European election 25 May 2014". historiaelectoral.com (in Spanish). Electoral History. Archived from the original on 24 September 2017. Retrieved 24 September 2017.