Haley, Michael
Sweet and Maxwell, 2007
Buku Teks
Mennell, Robert L.
West Publishing, 1994
Buku Teks
Hudson, Alastair
Cavendish Publishing Limited, 2003
Buku Teks
Stockwell, Nigel
Pitman, 1992
Buku Teks
Penner, J. E. (James E.)
Oxford University Press, 2016
Buku Teks