@book{17329,
	author = {Mager, Robert Frank,},
	title = {Die voorbereiding van onderrigdoelwitte /},
	publisher = {Nasou,},
	year = {1980.},
	address = {Goodwood :},
	edition = {1ste uitg.},
	note = {Oorspronklik gepubliseer onder titels: Preparing instructional objectives, en Preparing objectives for programmed instruction.}
}