@book{207916,
	author = {Mackey, William Francis. and ebrary, Inc.},
	title = {Sociolinguistic studies in language contact},
	publisher = {Mouton Publishers,},
	year = {c1979.},
	address = {The Hague ;},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10588183}
}