Ring of Brodgar Orkney Islands, Scotland
- 1. Ring of Brodgar. official website.
- 2. Burl, Aubrey and Dr. Aubrey Burl. A Guide to the Stone Circles of Britain, Ireland and Brittany. pp. 145-47. Yale University Press, 2004.
- 3. Ritchie, Anna; Ritchie Graham. Oxford Archaeological Guide to Scotland. pp. 187, 189. Oxford University Press, USA, 1997.
- 4. Wills, Elspeth and Michael Wills. Blue Guide Scotland. p. 550. Blue Guide, 2000.
