@book{12721,
	author = {Cummings, Karen.},
	title = {Understanding physics /},
	publisher = {Wiley,},
	year = {c2004-},
	address = {Hoboken, NJ :},
	note = {"Based on Fundamentals of physics by David Halliday, Robert Resnick, and Jearl Walker."},
	url = {http://www.loc.gov/catdir/description/wiley039/2003053481.html}
}