Editors. "King of Sicily surrenders his title at the command of Quadruple Alliance". The Literary Encyclopedia. First published 01 April 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=17226, accessed 18 April 2014.]
The King of Sicily surrenders his title and becomes King of Sardinia at the command of the Quadruple Alliance.