@book{204304,
	author = {Smith, Nancy L.},
	title = {Teaching elementary mathematics},
	publisher = {Wiley},
	year = {c2007.},
	series = {Wiley/Jossey-Bass education},
	address = {Hoboken, NJ},
	edition = {3rd ed.},
	url = {http://www.loc.gov/catdir/toc/fy0707/2007270174.html}
}