Shepherd, A., Henshall, A. S., Powell, F., Rapson, S., & Wickham-Jones, C. (1997). A Neolithic ring-mound at Midtown of Pitglassie, Auchterless, Aberdeenshire. Proceedings of the Society of Antiquaries of Scotland, 126, 17–51. https://doi.org/10.9750/PSAS.126.17.51