@book{63929,
	author = {Gawkrodger, D. J.},
	title = {Dermatology  an illustrated colour text},
	publisher = {Churchill Livingstone Elsevier},
	year = {2008},
	address = {Edimburgo (Escocia)},
	edition = {4th ed.},
	url = {http://www.loc.gov/catdir/toc/ecip079/2007003599.html}
}