Rochemont, Michael S.
Cambridge University Press, 1993
Buku Teks
Moon, Rousamund
Clarendon Press, 1998
Buku Teks
Hughes, Rebecca
Routledge, 1996
Buku Teks
Baka, Farida
Janus Publishing , 1988
Buku Teks
Burrow, J.A.
BlackWell Publishing, 2004
Buku Teks