References

1. Hilgenkamp, Kathryn. Environmental health. Jones & Bartlett Pub, 2005. 337-54. Print.

2. U.S. Department of Homeland Security, Federal Emergency Management Agency. "FEMA: Are You Ready." FEMA. Federal Emergency Management Agency, 2009. Web. 22 Apr 2010. .

3. National Center for Health Marketing, . "Center for Disease Control and Prevention." Center for Disease Control and Prevention, April 23, 2010. Web. 24 Apr 2010. .

4. World Health Organization, . World Health Organization, 2010. Web. 24 Apr 2010. .
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