Hudson, Alastair
Cavendish Publishing Limited, 2003
Buku Teks
Sydenham, Angela
Sweet & Maxwell, 2000
Buku Teks
Todd, Paul
London : Balckstone, 1994,
Buku Referensi
Haley, Michael
Sweet and Maxwell, 2007
Buku Teks
Evans, Michael
Butterworth, 1993
Buku Teks