Pinkerton, William J.
Project management: achieving project bottom-line success
McGraw-Hill , 2003
 Buku Teks SO
Horton, William
Evaluating e-learning: here in how you can: predict success, measure value, prove worth
ASTD Press, 2001
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Zabel, William D.
The rich die richer and you can too / William D. Zabel
William Morrow and Company, Inc., 1995
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Achieving the triple play: technologies and business models for success: comprehensive report
International Engineering Consortium
International Engineering Consortium, 2005
 eBooks
Browne, Harry
How you can profit the coming devaluation
Arlington House , 1971
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