Klass, David
Danger Zone
Scholastic Inc., 1996
 Buku Teks
Dalby, Andrew
Language in danger
A. Lane, 2002
 Buku Teks
Pressman, Roger S.
Software shock: the danger and the opportunity
Dorset House, 1991
 Buku Teks
Clancy, Tom
Clear and Present Danger
An Imprint of HarperCollins Publishere, 1989
 Buku Teks SO
Monmonier, Mark S.
Cartographies of danger : mapping hazards in America
The University of Chicago Press, 1997
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