Laing, Lloyd & Jennifer (1982). The Origins of Britain. London: Paladin. ISBN0-586-08370-7. {{cite book}}: Cite has empty unknown parameter: |coauthors= (help)
Piggott, Stuart (1954). Neolithic Cultures of the British Isles. Cambridge University Press. {{cite book}}: Cite has empty unknown parameter: |coauthors= (help)