Morris, Christopher D, Norman Emery, Colleen E Batey, Fred Bettess, Donald Bramwell, Alison Donaldson, Lloyd J Edwards, et al. 1987. “The Chapel and Enclosure on the Brough of Deerness, Orkney: Survey and Excavations, 1975-1977”. Proceedings of the Society of Antiquaries of Scotland 116 (November):301-74. https://doi.org/10.9750/PSAS.116.301.374.