@book{808,
	author = {Piaget, Jean, and Inhelder, Bärbel,},
	title = {The origin of the idea of chance in children /},
	publisher = {Routledge & K. Paul,},
	year = {1975.},
	address = {London :},
	note = {Translation of La genèse de l'idée de hasard chez l'enfant.}
}