Schlesinger, Rudolf B.
The Foundation Press, 1950
Buku Teks
Dine, Janet, author
Blackstone Press, 1993
Buku Teks
Jaffe, Louis L., author
Little, Brown, 1968
Buku Teks
Barrett, Edward L., author
Foundation Press, 1977
Buku Teks
Barnes, David W., author
West Publishing , 1992
Buku Teks