@book{35378,
	author = {Wardhaugh, Ronald. and Fuller, Janet M.,},
	title = {An introduction to sociolinguistics /},
	publisher = {Wiley Blackwell,},
	year = {c2015.},
	series = {Blackwell textbooks in linguistics,},
	address = {Chichester, West Sussex, UK ;},
	edition = {Seventh edition.}
}