@book{29864,
	author = {WAJNRYB, Ruth},
	title = {Classroom observation tasks :},
	publisher = {Cambridge University Press,},
	year = {1992.},
	series = {Cambridge Teacher Training and Development},
	address = {Cambridge :},
	url = {http://koha.tu.koszalin.pl/cgi-bin/koha/opac-detail.pl?biblionumber=29864}
}