@book{116995,
	author = {Letherby, Gayle. and ebrary, Inc.},
	title = {Extending social research},
	publisher = {McGraw-Hill/Open University Press,},
	year = {2007.},
	address = {Maidenhead :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10197018}
}