@book{93,
	author = {Kisnerman, Natalio },
	title = {Servicio social de grupo : },
	publisher = {Humanitas, },
	year = {1969},
	series = {Guidance ; },
	address = {Buenos Aires : },
	edition = {1 ed.},
	note = {Tomo 1: 028804, tomo 2: 028805}
}