1. Beaumont, P. (1990a). Pniel 1. In P. Beaumont & D. Morris (Eds.), Guide to the archaeological sites in the Northern Cape (pp. 7–9). McGregor Museum.
2. Beaumont, P. (1990b). Pniel 6 (The Bend). In P. Beaumont & D. Morris (Eds.), Guide to the archaeological sites in the Northern Cape (pp. 10–13). Kimberley.
3. INQUA XV International Conference Field Guide;P Beaumont,1999
4. Bergström, A., Stringer, C., Hajdinjak, M., Scerri, E. M., & Skoglund, P. (2021). Origins of modern human ancestry. Nature, 590(7845), 229–237.
5. Burkitt, M. C. (1928). South Africa’s past in Stone and Paint. Cambridge University Press.