Richards, Paul H.
Pitman, 1999
Buku Teks
Tang See Chim
Books International, 1987
Buku Teks
Brown, Ian, author
Blackstone, 1994
Buku Teks
Duxbury, Robert, author
Thomson Reuters, 2011
Buku Teks
Sinnadurai, Dato Seri Visu, author
Lexis lexis, 2011
Buku Teks