References
- Congressional Research Service . Library of Congress Washington D.C Seehttp://www.loc.gov/crsinfo
- Hui , S. 2006 . Survival of human race depends on moving into space . Hawking saysSan Diego Union Tribune , 14 June : A3
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- MIPT (National Memorial Institute for the Prevention of Terrorism)Terrorism Knowledge Database: Patterns of Global Terrorism.See http://www.mipt.org (http://www.mipt.org)
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- Stossel , J. 2004 . Give Me a Break , 77 New York : Harper Collins .