Julian Bamfor edited by
:Cambridge University Press, 2004
Buku Teks
Aitchison, Jean, 1938-, author
Cambridge University Press, 1995
Buku Teks
Spirkin, A.G., author
[publisher not identified], [date of publication not identified]
Buku Teks
Hazen, Kirk, author
Massachusetts : Wiley Blackwell, 2015
Buku Teks
Cambridge University Press, 2008
eBooks