Loffel, Egon W.
Financing your business / Egon W. Loffel
John Wiley & Sons, 1977
 Buku Teks
Shaw, Donald R
Your small business computer/ Donald R Shaw
Van Nostrand Reinhald, 1981
 Buku Teks
Downie, N. M.
Basic statistical methods / N. M. Downie, R. W. Heath
Harper & Row, Pub., 1974
 Buku Teks
Osgood, William R.
Preparing your business plan : with lotus 1-2-3 / William R. Osgood, and Dennis P. Curtin
Prentice-Hall, 1984
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Helmstetter, Greg, 1967-
Increasing hits and selling more on your website
John Wiley & Sons, 1997
 Buku Teks