@book{227393,
	author = {Tussy, Alan S. and Gustafson, R. David},
	title = {Elementary algebra},
	publisher = {Thomson Brooks/Cole},
	year = {c2008.},
	address = {Belmont, CA},
	edition = {4th ed.},
	note = {Includes indexes.},
	url = {http://www.loc.gov/catdir/toc/fy0803/2007940738.html}
}