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