"diabetic retinopathy." A Dictionary of Nursing. Oxford University Press. 2008. Encyclopedia.com. 28 Dec. 2009 <http://www.encyclopedia.com>.
"diabetic retinopathy." A Dictionary of Nursing. Oxford University Press. 2008. Encyclopedia.com. (December 28, 2009). http://www.encyclopedia.com/doc/1O62-diabeticretinopathy.html
"diabetic retinopathy." A Dictionary of Nursing. Oxford University Press. 2008. Retrieved December 28, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O62-diabeticretinopathy.html