@book{25519,
	author = {Orton, Anthony. and ebrary, Inc.},
	title = {Pattern in the teaching and learning of mathematics},
	publisher = {Continuum,},
	year = {2005.},
	series = {Continuum studies in mathematics education},
	address = {London ;},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10224637}
}