Sinnadurai, Dato Seri Visu, author
Lexis lexis, 2011
Buku Teks
Elliot, Catherine, author
Longman , 2001
Buku Teks
McKendrick, Ewan, author
Macmillan, 1994
Buku Teks
Palombino, Fulvio Maria, author
Cambridge University Press, 2019
eBooks
Burnham, Scott J., author
The Michie Company, 1993
Buku Teks