@book{4813,
	author = {Kolman, Bernard, and Busby, Robert C.},
	title = {Discrete mathematical structures /},
	publisher = {Pearson/Prentice Hall,},
	year = {c2009.},
	address = {Upper Saddle River, NJ :},
	edition = {6th ed.},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/toc/ecip0812/2008010264.html}
}