@book{693,
	author = {Mussen, Paul Henry.},
	title = {The psychological development of the child /},
	publisher = {Prentice-Hall,},
	year = {c1979.},
	series = {Prentice-Hall foundations of modern psychology series},
	address = {Englewood Cliffs, N.J. :},
	edition = {3d ed.}
}