Dorf, Richard C., author
Wiley, 1993
Buku Teks
Bell, David A., 1930-, author
Reston Publishing, 1981
Buku Teks
Floyd, Thomas L., author
Prentice-Hall, 1998
Buku Teks
Bogart, Theodore F.
McGraw-Hill, 1992
Buku Teks
Connelly, J. Alvin
Prentice-Hall, 1992
Buku Teks