@book{36677,
	author = {Spencer, John P.},
	title = {Toward a unified theory of development},
	publisher = {Oxford University Press,},
	year = {2009.},
	series = {Oxford series in developmental cognitive neuroscience},
	address = {New York ;},
	url = {http://dx.doi.org/10.1093/acprof:oso/9780195300598.001.0001}
}