@book{206692,
	author = {Earle, Roger W. and National Strength & Conditioning Association U.S.},
	title = {Manual NSCA :},
	publisher = {Editorial Paidotribo ,},
	year = {2008.},
	address = {Barcelona :},
	url = {http://www.loc.gov/catdir/toc/ecip048/2003019033.html}
}