@book{7273,
	author = {Hopper, Paul J. and Traugott, Elizabeth Closs.},
	title = {Grammaticalization /},
	publisher = {Cambridge University Press,},
	year = {2003.},
	address = {Cambridge, UK ;},
	edition = {2nd ed.},
	url = {http://www.loc.gov/catdir/description/cam041/2003283548.html}
}