Brownlee, Ian, author
Longman, 1998
Buku Teks
Cretney, Antonia, 1948-, author
Routledge, 1995
Buku Teks
Robson, L.L., author
Cambridge University Press, 1976
Buku Teks
National Council for Civil Liberties with Pluto Press, 1994
Buku Teks
Barback, R.H.
Philip Allan Publishers , 1984
Buku Teks