@book{11987,
	author = {Zill, Dennis G., and Wright, Warren S.},
	title = {Calculus : early transcendentals},
	publisher = {Jones and Bartlett Publishers,},
	year = {c2011.},
	series = {The Jones and Bartlett Publishers series in mathematics. Calculus},
	address = {Sudbury, Mass. :},
	edition = {4th ed.},
	note = {Includes Index.},
	url = {http://www.loc.gov/catdir/toc/ecip0828/2008040467.html}
}