@book{172243,
	author = {Walters, David. and ebrary, Inc.},
	title = {The value chain},
	publisher = {Emerald Group Pub.,},
	year = {2004.},
	series = {International journal of physical distribution & logistics management ;},
	address = {[Bradford, England] :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10058636}
}