@book{54447,
	author = {Biber, Douglas. and Conrad, Susan.},
	title = {Longman student grammar of spoken and written English workbook /},
	publisher = {Pearson Education :},
	year = {2006.},
	address = {Harlow, England :},
	edition = {6 impr.},
	url = {http://koha.tu.koszalin.pl/cgi-bin/koha/opac-detail.pl?biblionumber=54447}
}