Kauper, Paul G., author
Little, Brown, 1966
Buku Teks
Barnes, David W., author
West Publishing , 1992
Buku Teks
Henderson, Roger C., author
Michie Law , 1996
Buku Teks
Rivkind, Nina, author
Thomson/West, 2009.
Buku Teks
Scoles, Eugene F., author
West Publishing, 1967
Buku Teks