@book{145404,
	author = {Vázquez de Betancourt, Ana L.},
	title = {Dinámica de grupos :},
	publisher = {Editorial Nosotros ,},
	year = {1993.},
	address = {San Juan, P.R. :},
	edition = {2. ed.},
	note = {At foot of title: Liga de Cooperativas de Puerto Rico.}
}