Reference list

      Rodney Ronquillo. (March 25, 2007). Home Toxicity-Pros and Cons of using vinegar as a  natural cleaner.  September 29, 2012, http://ezinearticles.com/?Home-Toxicity---Pros-and-Cons-of-Using-Vinegar-As-a-Natural-Cleaner&id=637987.

     (September 10, 2005). Material Safety Data Sheet Sodium   hydroxide MSDS.  September 29, 2012, http://www.cen.iitb.ac.in/cen/new%20msds/sodium%20hydroxidemsds.php.pdf.

      (February 27, 2007) Acetic acid (ethanoic acid): Overview. September 29, 2012, http://www.npi.gov.au/substances/acetic-acid/health.html.

     Maria Rodale. (2009) This or That: Bleach vs. Vinegar to Kill Germs. September 29, 2012,http://www.rodale.com/natural-disinfectant.

     (September 10, 2005) Material Safety Data Sheet Acetic acid MSDS. September 29, 2012,http://www.sciencelab.com/msds.php?msdsId=9922769    

     (December 29, 2008).  Guideline for Disinfection and Sterilization in Healthcare Facilities, 2008. September 29, 2012, http://www.cdc.gov/hicpac/disinfection_sterilization/6_0disinfection.html.