George Allen and Unwin, 1979
Buku Teks
Blaufarb, Rafe, author
Oxford University Press, 2016
eBooks
Jacquelin Burgess and John R. Gold.
Routledge , 2016
Buku Teks
Reynolds, Kimberley
Harvester Wheatsheaf, 1990
Buku Teks
edited by Katie Scott and Deborah Cherry
Blackwell Publishing, 2005
Buku Teks