"syndrome X." A Dictionary of Nursing. Oxford University Press. 2008. Encyclopedia.com. 16 Dec. 2009 <http://www.encyclopedia.com>.
"syndrome X." A Dictionary of Nursing. Oxford University Press. 2008. Encyclopedia.com. (December 16, 2009). http://www.encyclopedia.com/doc/1O62-syndromeX.html
"syndrome X." A Dictionary of Nursing. Oxford University Press. 2008. Retrieved December 16, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O62-syndromeX.html