Steven G. Midema
Princeton University press, 1997
Buku Teks
Cooter, Robert, author
Addison-Wesley, 2000
Buku Teks
Posner, Eric A., author
Ashgate, 2001
Buku Teks
Gellhorn, Ernest, author
West , 1994
Buku Teks
Gellhorn, Ernest, author
St.paul Minn, 1986
Buku Teks