@book{1781,
	author = {Whitten, Jeffrey L. and Bentley, Lonnie D.},
	title = {Systems analysis and design methods. /},
	publisher = {McGraw-Hill Irwin,},
	year = {c2004.},
	address = {Boston :},
	edition = {6th ed.},
	url = {http://www.loc.gov/catdir/toc/mh031/2003046322.html}
}