Eubanks, Philip, 1954-
Cambridge University Press, 2011
eBooks
Salkie, Raphael
London, 1995
Buku Teks
Dijk, Teun A. van, 1943-
Longman, 1992
Buku Teks
Baka, Farida
Janus Publishing , 1988
Buku Teks
Cook, Guy W.D.
Oxford University Press , 1993
Buku Teks