Yeoman, Peter, S Boardman, S Carter, P Cundhill, K Cuthbert, D Davidson, B Finlayson, et al. 1999. “Excavations at Castle of Wardhouse, Aberdeenshire”. Proceedings of the Society of Antiquaries of Scotland 128 (November):581-617. https://doi.org/10.9750/PSAS.128.581.617.