Harris, Donald, author
Cambridge University Press, 2005
Buku Teks
Harris, Donald, author
Weidenfeld and Nicolson, 1988
Buku Teks
Dawson, John Philip, author
Foundation Press, 1969
Buku Teks
Duxbury, Robert, author
Thomson Reuters, 2011
Buku Teks
Robert Upex
Sweet & Maxwell, 1995
Buku Teks