Arnull, Anthony
Leicester University Press, 1990
Buku Teks
Lucas, John, author
Cassell, 1980
Buku Referensi
Phang Boon Leong, Andrew
LexisNexis, 1998
Buku Teks
Tan, Kevin.
Butterworth Asia, 1997
Buku Teks
Phang Boon Leong, Andrew
Butterworths Asia , 1994
Buku Teks