@book{87,
	author = {Silberberg, Martin S. and Amateis, Patricia},
	title = {Chemistry :},
	publisher = {Mc Graw Hill,},
	year = {2012.},
	address = {New York :},
	edition = {7th ed.},
	url = {https://books.google.com.pk/books?id=PcuQnAEACAAJ&dq=007351117&hl=en&sa=X&ved=0ahUKEwigp7G9jcrLAhUCQBoKHaqQD2QQ6AEIIjAC}
}