@book{29917,
	author = {Piaget, Jean, and ebrary, Inc.},
	title = {Play, dreams and imitation in childhood},
	publisher = {Routledge,},
	year = {1999, c1951.},
	series = {Developmental psychology ;},
	address = {London :},
	note = {Originally published: London : Routledge and Kegan Paul, 1951.},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10017405}
}