American Dental Association, "Oral Health Topics: Bad Breath (Halitosis)," http://www.ada.org/public/topics/bad_breath.asp (accessed February 17, 2010)

Animated Teeth, "Bad Breath: Testing Yourself for Halitosis," http://www.animated-teeth.com/bad_breath/t1_halitosis.htm (accessed February 18, 2010)

Agency for Toxic Substances and Disease Registry, "ToxFAQs for Hydrogen Peroxide," http://www.atsdr.cdc.gov/tfacts174.html (accessed February 18, 2010)

MSN Health & Fitness, "Bad Breath Blues," http://health.msn.com/health-topics/oral-care/articlepage.aspx?cp-documentid=100135065 (accessed February 18, 2010)

University of California San Diego, "Health Library: Halitosis," http://myhealth.ucsd.edu/library/healthguide/en-us/Cam/topic.asp?hwid=hn-3567002#hn-3567002-focus-options (accessed February 18, 2010)