Ritchie, Anna, D Bramwell, G H Collins, C Dickson, J G Evans, A S Henshall, R Inskeep, H Kenward, B A Noddle, M Vaughan, A Wheeler, G Whittington, and D F Williams. 1984. “Excavation of a Neolithic Farmstead at Knap of Howar, Papa Westray, Orkney”. Proceedings of the Society of Antiquaries of Scotland 113 (November), 40-121. https://doi.org/10.9750/PSAS.113.40.121.