Medline Plus (definition), no author or date. Accessed 02/03/14 - http://www.nlm.nih.gov/medlineplus/edema.html
MedlinePlus, updated by Linda J. Vorvick, MD on 10/14/12. Accessed 02/03/14 - http://www.nlm.nih.gov/medlineplus/ency/article/003103.htm
University of Maryland, reviewed by Steven D. Ehrlick NMD on 03/02/2012. Accessed 02/03/14 - http://umm.edu/health/medical/altmed/condition/edema
UpToDate, written by R. H. Sterns, updated 11/12. Accessed 02/03/14 –
http://www.uptodate.com/contents/edema-swelling-beyond-the-basics?view=print