@book{43776,
	author = {Mager, Robert Frank,},
	title = {Preparing instructional objectives /},
	publisher = {Fearon-Pitman Publishers,},
	year = {c1975.},
	address = {Belmont, Calif. :},
	edition = {2nd ed.},
	note = {First ed. published in 1961 under title: Preparing objectives for programmed instruction.}
}