@book{1959,
	author = {Crystal, David,},
	title = {Linguistics /},
	publisher = {Penguin Books,},
	year = {1981, c1971.},
	series = {Pelican books},
	address = {Harmondsworth, Middlesex, England :},
	edition = {Repr. with revisions.},
	note = {Includes indexes.}
}