@book{117984,
	author = {Gredler, Margaret E. and Shields, Carolyn Claytor. and ebrary, Inc.},
	title = {Vygotsky's legacy},
	publisher = {Guilford Press,},
	year = {c2008.},
	address = {New York :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10201013}
}