Anderson, T., author
Prentice-Hall, 1981
Buku Teks
Bugajski, Janusz, author
Westview Press, 1989
Buku Teks
Loveday, George, author
Longman, 1995
Buku Teks
edited by Marc Joye and Michael Tunstall
Springer-Verlag, 2012
eBooks
Chen, Tinghuai, author
Springer-Verlag , 1992
Buku Teks