@book{20,
	author = {Feldman, Robert S. and Velázquez Arellano, Jorge Alberto,},
	title = {Psicología con aplicaciones en países de habla hispana },
	publisher = {McGraw-Hill,},
	year = {2002.},
	address = {México :},
	edition = {4a ed. },
	note = {Traducción de: Essentials understanding psychology, 4th ed. 1997.}
}