@book{1192,
	author = {Hale, Michael S. and City, Elizabeth A.},
	title = {The teacher's guide to leading student-centered discussions :},
	publisher = {Corwin Press,},
	year = {c2006.},
	address = {Thousand Oaks, Calif. :},
	url = {http://www.loc.gov/catdir/toc/ecip062/2005031710.html}
}