"‘We are Orcadian first, and Scottish second’ many people would tell me during the course of my fieldwork." McClanahan, Angela (2004) The Heart of Neolithic Orkney in its Contemporary Contexts: A case study in heritage management and community values. Historic Scotland/University of Manchester, p. 25 (§3.47) [1] Retrieved 8 January 2010.
Odling, N.W.A. (2000) "Point of Ayre"(PDF) . "Caledonian Igneous Rocks of Great Britain: Late Silurian and Devonian volcanic rocks of Scotland". Geological Conservation Review17 : Chapter 9, p. 2731. JNCC. Retrieved 4 October 2009.
