Schiffrin, Deborah, author
Cambridge University Press, 1996
Buku Teks SO
Fairclough, Norman, author
Hodder Education, 1995
Buku Teks
Cook, Guy W.D., author
Routledge, 1992
Buku Teks
Baka, Farida, author
Janus Publishing , 1988
Buku Teks
Schiffrin, Deborah, author
Blackwell, 1994
Buku Teks