@book{223630,
	author = {Armstrong, William F. and Ryan, Thomas,},
	title = {Ecocardiografía de Feigenbaum},
	publisher = {Wolters Kluwer Health/Lippincott Williams & Wilkins},
	year = {c2011.},
	address = {Madrid},
	edition = {7th ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy1012/2009034420-d.html}
}