@book{117217,
	author = {Tordo, Silvana. and Tracy, Brandon S., and ebrary, Inc.},
	title = {National oil companies and value creation},
	publisher = {World Bank,},
	year = {2011.},
	series = {World Bank working paper,},
	address = {Washington, D.C. :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10506396}
}