Fisse, Brent
Cambridge University Press, 1993
Buku Teks
Hamilton, Robert W.
West Publishing, 1992
Buku Teks
Henn, Harry, Alexander, John R
St.Paul,Minn : West publishing Co, 1983,
Buku Referensi
Hamilton, Robert W.
West Publishing, 1996
Buku Teks
Lipton, Phillip
The Law Book Company Limited, 1995
Buku Teks