References
- Armstrong , G and Hobbs , D . 1994 . “ Tackled from Behind ” . In Football, Violence and Social Identity , London : Routledge .
- Hobbs , D . 1988 . Doing the Business , Oxford : Oxford University Press .
- Manning P ( 1977 ) Police Work . MIT Cambridge, Mass
- Marx , G . 1988 . Undercover Police , Berkeley, California : University of California Press .
- Radzinowicz L ( 1956 ) A History of the English Criminal Law and its Administration . Vol Stevens London 3