(2003) "Towers in the North: The Brochs of Scotland", Stroud : Tempus, ISBN 0-7524-1932-3* Ballin Smith, B. and Banks, I.
(2003) "Towers in the North: The Brochs of Scotland", Stroud : Tempus, ISBN 0-7524-1932-3* Ballin Smith, B. and Banks, I.