@book{46821,
	author = {Cox, Joyce, and Preppernau, Joan.},
	title = {Microsoft Office PowerPoint 2007 step by step /},
	publisher = {Microsoft Press,},
	year = {c2007.},
	series = {Step by step},
	address = {Redmond, Wash. :},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/toc/fy0707/2006937016.html}
}