Lynch, Richard
Prentice-Hall, 2000
Buku Teks
Long, Larry E.
Prentice-Hall, 1982
Buku Teks
Rothberg, Robert R.
The Free Press, 1981
Buku Teks SO
Johnson, Gerry
Prentice-Hall, 1988
Buku Teks
Tribe, John
International Thomson Business Press, 1997
Buku Teks