American Bar Association, 1975
Buku Teks
Gellhorn, Ernest, author
West , 1994
Buku Teks
Gellhorn, Ernest, author
St.paul Minn, 1986
Buku Teks
Gellhorn, Ernest, author
West, 2004
Buku Teks
Posner, Richard A., author
The University of Chicago, 1976
Buku Teks