Diane K Bolton, H P F King, Gillian Wyld and D C Yaxley, 'Harmondsworth: Introduction', in the Victoria County History collaborative professional historian's series, A History of the County of Middlesex Volume 4 ed. T F T Baker, J S Cockburn and R B Pugh (London, 1971), pp. 1–7. British History Online http://www.british-history.ac.uk/vch/middx/vol4/pp1-7