@book{50085,
	author = {Jones, Leo},
	title = {Progress to Proficiency /},
	publisher = {Cambridge University Press,},
	year = {1993.},
	series = {Cambridge Examinations Publishing},
	address = {Cambridge [etc.] :},
	url = {http://koha.tu.koszalin.pl/cgi-bin/koha/opac-detail.pl?biblionumber=50085}
}