Campion, H.
Oxford University Press, 1939
Buku Teks
Edenborough, Michael
Cavendish Publishing Limited, 1995
Buku Teks
Edenborough, Michael
Cavendish Publishing , 1994
Buku Teks
Bridge, Michael G.
Blackstone Press Limited, 1996
Buku Teks
Cornish, W.R. (William Rodolph), 1937-, author
Sweet and Maxwell, 2007
Buku Referensi