Information sur la source

Ancestry.com. Sutherland and Caithness in saga-time, or, The jarls and the Freskyns [base de données en ligne]. Provo, UT: Ancestry.com Operations Inc, 2005.
Données originales : Gray, James,. Sutherland and Caithness in saga-time, or, The jarls and the Freskyns. Edinburgh: Oliver & Boyd, 1922.