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 Mary Stewart, Countess of Buchan:

"

The title of Buchan was eventually conferred, in 1469, on her half-brother James Stewart (her mother's son by her second marriage), who was called the 1st Earl of Buchan.[citation needed]