edited by M.J. Toswell and E.M. Tyler
Routledge, 1996
Buku Referensi
Hughes, Arthur
Cambridge University Press, 1994
Buku Teks SO
Tarner, Margaret
Dian Rakyat, 1991
Buku Teks
Archipelago Press , 1998
Buku Teks
Moore, Colette
Cambridge University Press , 2011
Buku Teks