@book{1492,
	author = {Zigler, Edward, and Gilliam, Walter S.},
	title = {A vision for universal preschool education /},
	publisher = {Cambridge University Press,},
	year = {2006.},
	address = {Cambridge ;},
	url = {http://www.loc.gov/catdir/toc/ecip0518/2005023913.html}
}