@book{6503,
	author = {Wardhaugh, Ronald.},
	title = {An introduction to sociolinguistics /},
	publisher = {Blackwell,},
	year = {c1992 [Reprinted 1993].},
	series = {Blackwell textbooks in linguistics.},
	address = {Oxford : },
	edition = {2nd ed.},
	note = {Includes index.}
}