@book{242345,
	author = {Leenders, Michiel R. and Fearon, Harold E.,},
	title = {Purchasing and materials management /},
	publisher = {R. D. Irwin,},
	year = {1980.},
	address = {Homewood, Ill. :},
	edition = {7th ed.},
	note = {Sixth ed. by W. B. England and M. R. Leenders.}
}