Hornby, Albert Sydney, author
Macmillan, 1951
Buku Teks
Ross, Janet, author
Harper & Row , 1965
Buku Teks
Doff, Adrian, author
Cambridge University Press, 2010
Multimedia
Doff, Adrian, author
Cambridge University Press , 2010
Buku Teks
Alex Tilbury, Theresa Clementson, Leslie Hendra, David Rea, Maggie Baigent, Chris Cavey, Nick Robinson ; consultant editor Adrian Doff
Cambridge University Press , 2012
Buku Teks