@book{27328,
	author = {Caplin, Andrew. and ebrary, Inc.},
	title = {The foundations of positive and normative economics},
	publisher = {Oxford University Press,},
	year = {2008.},
	series = {The handbooks in economic methodologies series},
	address = {Oxford ;},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10225214}
}