Dolan, John F., author
Aspen Law & Business , 1997
Buku Teks
Smith, Len Young, author
West, 1966
Buku Teks
White, James J., author
West Publishing Co., 1972
Buku Teks
West Publishing Co., 1993
Buku Referensi
Braucher, Robert, author
Foundation Press, 1958
Buku Teks