@book{57787,
	author = {Empson, Scott.},
	title = {CCNA Portable Command Guide /},
	publisher = {Cisco Press,},
	year = {c2008.},
	address = {Indianapolis, Ind. :},
	edition = {2nd ed.},
	url = {http://www.loc.gov/catdir/toc/ecip0720/2007023863.html}
}