@book{43049,
	author = {Whitten, Jeffrey L. and Bentley, Lonnie D.},
	title = {Systems analysis and design methods /},
	publisher = {McGraw-Hill/Irwin,},
	year = {c2007},
	address = {Boston :},
	edition = {7th ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy0634/2005054019-t.html}
}