@book{6148,
	author = {Benton, W. C.,},
	title = {Purchasing and supply management /},
	publisher = {McGraw-Hill Irwin,},
	year = {c2007.},
	address = {Boston :},
	url = {http://www.loc.gov/catdir/enhancements/fy0632/2006008683-d.html}
}