@book{179157,
	author = {Cavagnaro, Elena. and Curiel, George. and ebrary, Inc.},
	title = {The three levels of sustainability},
	publisher = {Greenleaf Pub.,},
	year = {2012.},
	address = {Sheffield, South Yorkshire, England :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10650167}
}