National Council for Civil Liberties with Pluto Press, 1994
Buku Teks
McNeill, Patrick
Macmillan, 1991
Buku Teks SO
Smith, Kelvin
Facet Publishing, 2004
Buku Teks
Stone, Richard
Blackstone Press limited, 1997
Buku Teks
Fulton, Rorie
Learning Matters, 2011
Buku Teks