@book{31475,
	author = {Swan, Michael, and Walter, Catherine,},
	title = {Oxford English grammar course.},
	publisher = {Oxford University Press,},
	year = {2011.},
	address = {Oxford :},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/enhancements/fy1506/2011275520-d.html}
}