Quotes, Paraphrasing, Citation #2

"No one factor appears to cause Alzheimer's disease. Instead, scientists believe that it may take a combination of genetic, lifestyle and environmental factors to trigger the onset of symptoms. While the causes of Alzheimer's are poorly understood, its effect on brain tissue is clear. Alzheimer's disease damages and kills brain cells."
 Source:
"Alzheimer's Disease." MayoClinic. MayoClinic, 17 January 2009. Web. 10 Nov 2010. .
BIBLIOGRAPHIC CITATION: "Alzheimer's Disease." MayoClinic. MayoClinic, 17 January 2009. Web. 10 Nov 2010. . [NOTE: Italicize "MayoClinic"] PARENTHETICAL CITATION: ("MayoClinic")
http://www.mayoclinic.com/health/alzheimers-disease/DS00161/DSECTION=causes

There is not a common cause for developing Alzheimer's disease. Some people may develop this disease because of genetics, their lifestyle, and their environmental surroundings. Even though scientists cannot understand why people may get Alzheimer's and how to prevent it, they do know that it creates problems within it brain chambers and the brain cells.