Head, Robert V.
A guide to packaged systems
Wiley-Interscience, 1971
 Buku Referensi
Cascarino, Richard
Auditor's guide to information systems auditing
John Wiley & Sons, 2007
 Buku Teks
Woodson, R. Dodge
A builder's guide to wells and septic systems
McGraw-Hill, 2010
 Buku Teks
Waterman, Donald A.
A Guide to expert systems / Donald A. Waterman.
Addison-Wesley Publishing, 1986
 Buku Referensi
Guide to improving efficiency of combustion systems
edited by Albert Thumann
The Fairmont Press, 1988
 Buku Referensi