Ritchie, A.; Bramwell, D.; Collins, G. H.; Dickson, C.; Evans, J. G.; Henshall, A. S.; Inskeep, R.; Kenward, H.; Noddle, B. A.; Vaughan, M. Excavation of a Neolithic Farmstead at Knap of Howar, Papa Westray, Orkney. PSAS 1984, 113, 40-121.