@book{152697,
	author = {Petty, Ray.},
	title = {Manejo del salón de clases : },
	publisher = {Centro de Publicaciones de la Universidad Interamericana , },
	year = {1987.},
	address = {San Germán, P.R. :},
	edition = {3. ed.},
	note = {Translation of: Classroom management: a resource manual for frontline teachers.}
}