@book{115666,
	author = {Crabbé, Ann. and Leroy, Pieter. and ebrary, Inc.},
	title = {The handbook of environmental policy evaluation},
	publisher = {Earthscan,},
	year = {2008.},
	address = {London ;},
	url = {http://site.ebrary.com/lib/strathmore/Doc?id=10256330}
}