@book{50088,
	author = {SWAN, Michael and SMITH, Bernard.},
	title = {Learner English :},
	publisher = {Cambridge University Press,},
	year = {1988.},
	series = {Cambridge Handbooks for Language Teachers / Michael Swan and Roger Bowers, general editors},
	address = {Cambridge [etc.] :},
	edition = {[Reprint].},
	note = {1st published in 1987.}
}