@book{447,
	author = {Silberschatz, Abraham. and Galvin, Peter B.},
	title = {Operating system concepts /},
	publisher = {John Wiley,},
	year = {c2002.},
	address = {New York :},
	edition = {6th ed.},
	url = {http://www.loc.gov/catdir/description/wiley035/2001276306.html}
}