Thompson, Mark P., author
Sweet & Maxwell, 1995
Buku Teks
Curzon, L. B., author
Pitman, 1993
Buku Teks
Chappelle, Diane
Pitman, 1992
Buku Teks
Tan Sook Yee, author
Butterworth Asia, 2001
Buku Teks
Thompson, Mark P., author
Oxford University Press, 2001
Buku Teks