@book{7,
	author = {Díaz Barriga Arceo, Frida and Hernandez Rojas, Gerardo},
	title = {Estrategias docentes para un aprendizaje significativo :},
	publisher = {Mc Graw Hill,},
	year = {2010.},
	address = {México D.F. :},
	edition = {3a  ed.}
}