1. Burl, Aubrey, From Carnac to Callanish, Yale University Press 1993.
  2. Graham, Robert C., The Carved Stones of Islay, James Maclehose & Son: Glasgow 1895.
  3. Gruamach, Domhnull, The Foundations of Islay (2 volumes), House of Islay 1964-70.
  4. Lamont, W.D., Ancient and Medieval Sculptured Stones of Islay, John Smith: Glasgow 1972.
  5. MacKie, Euan, “Cultoon, Islay,” in Glasgow Archaeological Society Bulletin, no.2, Spring 1976.
  6. Royal Commission on the Ancient & Historical Monuments of Scotland, Argyll – volume 5: Islay, Jura, Colonsay and Oronsay, HMSO: Edinburgh 1984.
  7. Ruggles, C.L.N., Megalithic Astronomy: A New Archaeological and Statistical Study of 300 Western Scottish Sites, BAR: Oxford 1984.
  8. Swire, Otta F., The Inner Hebrides and their Legends, Collins: London & Glasgow 1964.