@book{78690,
	author = {Wittrock, M. C. and American Educational Research Association.},
	title = {Changing education: alternatives from educational research / },
	publisher = {Prentice-Hall, },
	year = {1973.},
	series = {Prentice-Hall American Educational Research Association series},
	address = {Englewood Cliffs, N.J. : }
}