@book{646,
	author = {Levine, Ira.N},
	title = {Physical chemistry },
	publisher = {Tata Mcgraw Hill Education,},
	year = {2011.},
	address = {New Delhi},
	edition = {6th ed.},
	url = {http://www.amazon.com/exec/obidos/ASIN/0071321217/chopaconline-20}
}