@book{5455,
	author = {University of Cambridge},
	title = {Cambridge proficiency :},
	publisher = {Cambridge University Press,},
	year = {1991.},
	series = {Cambridge Examinations Publishing},
	address = {Cambridge ;},
	edition = {5th printing.},
	url = {http://koha.tu.koszalin.pl/cgi-bin/koha/opac-detail.pl?biblionumber=5455}
}