@book{48168,
	author = {DOFF, Adrian and JONES, Christopher.},
	title = {Language in use :},
	publisher = {Cambridge University Press,},
	year = {1997.},
	address = {Cambridge :},
	url = {http://koha.tu.koszalin.pl/cgi-bin/koha/opac-detail.pl?biblionumber=48168}
}