Frances, Bryan:
Polity Press, 2014
Buku Teks
Cleese, John
BBC Worldwide Limited, 2003
Multimedia
Thomas G.M. Schalkhammer, editor
Birkhauser, 2002
Buku Teks
Sobti, R.C.
CRC Press, Taylor & Francis Group, 2009
Buku Teks
Lowrie, Pauline
Cambridge University Press, 1994
Buku Teks