Schwartz, Bernard, author
Clarendon Press Oxford, 1972
Buku Teks
Davis, Kenneth Culp
West Publishing, 1959
Buku Teks
Mayss, Abla, author
Ashgate, 1998
Buku Referensi
Carter, Lief H.
Harpercollins , 1991
Buku Teks
Manchester University Press , 1995
Buku Teks