@book{10268,
	author = {Wardhaugh, Ronald.},
	title = {An introduction to sociolinguistics /},
	publisher = {Blackwell Pub.,},
	year = {2006.},
	series = {Blackwell textbooks in linguistics ;},
	address = {Malden, Mass., USA :},
	edition = {5th ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy0802/2005019312-b.html}
}