M.J. Gunn
Sweet and Maxwell, 1996
Buku Teks
Lambert, Rene, author
Ce?padues-Editions, 1991
Buku Referensi
Impact Books, 1993
Buku Referensi
edited by Marie-Helene Correard
Oxford University Press, [Date of publication not identified]
Buku Referensi
Lambirth, Andrew
Learning Matters, 2005
Buku Teks