@book{50112,
	author = {Levine, Ira N.},
	title = {Quantum chemistry /},
	publisher = {Prentice Hall,},
	year = {2009},
	address = {Upper Saddle River, N.J. :},
	edition = {6th ed.},
	url = {http://www.loc.gov/catdir/toc/ecip0815/2008015095.html}
}