@book{72326,
	author = {Howe, Christine. and ebrary, Inc.},
	title = {Conceptual structure in childhood and adolescence},
	publisher = {Routledge,},
	year = {1998.},
	series = {International library of psychology},
	address = {London :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10056081}
}