@book{30186,
	author = {CRYSTAL, David},
	title = {The Cambridge encyclopedia of language /},
	publisher = {Cambridge Univ. Press,},
	year = {1987.},
	address = {Cambridge :},
	url = {http://koha.tu.koszalin.pl/cgi-bin/koha/opac-detail.pl?biblionumber=30186}
}