@book{135883,
	author = {Sánchez Hidalgo, Efraín Sigisfredo},
	title = {Psicología educativa /},
	editor = {Printing 1988.},
	publisher = {Editorial Universitaria, Universidad de Puerto Rico ,},
	year = {1976.},
	address = {Río Piedras, P.R. :},
	edition = {9. ed. rev.}
}