@book{115252,
	author = {Dresner, Simon, and ebrary, Inc.},
	title = {The principles of sustainability},
	publisher = {Earthscan,},
	year = {2008.},
	address = {London :},
	edition = {2nd ed.},
	url = {http://site.ebrary.com/lib/strathmore/Doc?id=10256323}
}