@book{4170,
	author = {Forouzan, Behrouz A. and Fegan, Sophia Chung.},
	title = {Data communications and networking },
	publisher = {McGraw-Hill Companies,},
	year = {c2007.},
	address = {New Delhi :},
	edition = {4th ed.},
	url = {http://www.loc.gov/catdir/toc/ecip066/2006000013.html}
}