@book{33306,
	author = {Halliday, and Resnick, Robert,},
	title = {Principls of physics /},
	publisher = {John Wiley & Sons, Inc.},
	year = {2011},
	address = {New Jersey},
	edition = {9th edition.},
	note = {At head of title: Halliday & Resnick.}
}