@book{230,
	author = {Howard-Snyder, Frances. and Howard-Snyder, Daniel.},
	title = {The power of logic /},
	publisher = {McGraw-Hill,},
	year = {c2012.},
	address = {New York :},
	edition = {5th ed.},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/enhancements/fy1205/2011053000-d.html}
}