@book{255866,
	author = {Freedman, Roger A. and Geller, Robert M.},
	title = {Universe.},
	publisher = {W.H. Freeman,},
	year = {c2011.},
	address = {New York :},
	edition = {4th ed.},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/enhancements/fy1201/2009941776-d.html}
}