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2. Barnes, A. n.d. http://stbride.org/friends/conference/temporarytype/overgroundarchaeology .
3. Bristol City Council n.d. Bristol City Council’s Graffiti Policy.
4. Cocroft, W., Devlin, D., Schofield, J., Thomas, R. J. C. (2006) War Art, Murals and Graffiti, Military Life, Power And Subversion, Council for British ArchaeologyYork.,
5. Cody, L. F. (2003) Every Lane Teems With Instruction, and Every Alley Is Big With Erudition’ Graffiti in Eighteenth Century London. In The Streets of Londonpp. 82–100, edited by T Hitchcockand H Shore, Rivers Oram PressLondon.,