Fielding, Helen
Picador, 1997
Buku Teks SO
Connelly, Bridget
University Press, 1986
Buku Teks
Wells, Matthew
Watson-Guptill Publications, 2002
Buku Teks
Mettem, Christopher J.
Spon Press, 2011
Buku Teks
Sparrow, John, 1906-
Published for the British Council and the National Book League by Longmans, Green, 1992
Buku Teks SO