Smart, Huw
Blackstone's police Q and A : crime 2006
Oxford University Press, 2006
 Buku Referensi
Smart, Huw
Blackstone's police Q and A : road policing 2006
Oxford University Press, 2006
 Buku Referensi
Smart, Huw
Blackstone's police Q and A : evidence and procedure 2006
Oxford University Press, 2006
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Lundman, Richard J.
Police and policing
Holty,Rinchart and Winston, 1980
 Buku Teks
Maitland, F.W.
Justice and police
Russel & Russell, 1885
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