McLeod, Raymond, author
Prentice-Hall, 2001
Buku Teks
Dickson, Gary W., author
McGraw-Hill, 1985
Buku Teks
Lucas, Henry C., author
McGraw-Hill, 1986
Buku Teks
T. Kanti Srikantaiah, Michael E.D. Koenig, editor
Information Today, 2000
Buku Teks
Kroenke, David M., 1946-, author
McGraw-Hill, 1994
Buku Teks