@book{56963,
	author = {Gagne, Robert M. and Briggs, Leslie J.},
	title = {Principles of instructional design},
	publisher = {Holt, Rinehart and Winston},
	year = {1988},
	address = {New York [u.a.]},
	edition = {3. ed.},
	note = {Literaturangaben}
}