Scales, Peter, 1949-, author
Open University Press, 2013
Buku Teks
Murray Saunders, Paul Trowler and Veronica Bamber, editor
McGraw-Hill, 2011
Buku Teks
Evans, Norman, 1923-, author
Routledge, 2001
Buku Teks
Rajika Bhandari, editor
AIFS Foundation, 2009
Buku Teks
edited by Louise Morley
Taylor and Francis, 1996
Buku Teks