Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page 1016:

"

* The Pisan and the Genoese republics launch a naval offensive against the Muslim strongholds of Sardinia, in particular Porto Torres, and defeat the fleet of the taifa king of Dénia, Mujāhid al-ʿĀmirī.[4]