Nordsieck, Wolfram (2013). "Aosta Valley/Italy". Parties and Elections in Europe. Archived from the original on 22 February 2018. Retrieved 1 June 2012.
Nordsieck, Wolfram (2013). "Aosta Valley/Italy". Parties and Elections in Europe. Archived from the original on 22 February 2018. Retrieved 1 June 2012.