Hamilton, Robert W.
St. Paul, Minn, 1989
Buku Teks
Hamilton, Robert W., author
West Publishing, 1984
Buku Teks
Axelrod, Alan, author
Little, Brown, 1970
Buku Teks
Vagts, Detlev F., author
Foundation Press, 1973
Buku Teks
Nelson, Grant S., author
West Publishing, 1992
Buku Teks