@book{8076,
	author = {Arnau Grass, Jaime},
	title = {Diseños Experimental en Psicología y Educación /},
	publisher = {Trillas,},
	year = {1990.},
	series = {Biblioteca métodos y técnicas de investigación psicológica},
	address = {México :},
	edition = {2.}
}