@book{55151,
	author = {Yule, George},
	title = {The study of language /},
	publisher = {Cambridge University Press,},
	year = {2006},
	address = {Cambridge, UK ;},
	edition = {3rd ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy0642/2005012919-t.html}
}