Keeton, Robert E.
West Publishing, 1988
Buku Teks
Beatty, Jeffrey F.
South Western Cengage Learning, 2011
Buku Teks
Breyer, Stephen G., 1938-
Little, Brown, 1982
Buku Teks
Breyer, Stephen G., 1938-
Little, Brown and Company, 1979
Buku Teks
Kerr, Thomas S.
John Wiley & Sons, 1952
Buku Teks