Pollack, Ervin H.
The Foundation Press, Inc, 1967
Buku Teks
The Foundation Press,Inc., 1973
Buku Teks
Harris, Myra A., author
Prentice-Hall, 1997
Buku Teks
Bander, Edward J., author
Balinger, 1978
Buku Teks
Cohen, Morris L., author
West Publishing, 1968
Buku Teks