@inbook { 6042,
	title = {Computerbasierte Medien im Unterricht},
	booktitle = {Handbuch Unterricht},
	year = {2009},
	address = {Bad Heilbrunn},
	url = {http://mediendidaktik.uni-due.de/sites/default/files/natt-ke-unterricht_0_0.pdf},
	author = {Nattland, Axel and Michael Kerres},
	editor = {Arnold, Karl-Heinz and Sandfuchs, Uwe and Wiechmann, J{\"u}rgen}
}
@inbook { 6016,
	title = {Computerbasierte Medien im Unterricht},
	booktitle = {Handbuch Unterricht},
	year = {2006},
	publisher = {Klinkhardt},
	organization = {Klinkhardt},
	address = {Bad Heilbrunn},
	author = {Nattland, Axel and Michael Kerres},
	editor = {Arnold, Karl-Heinz and Sandfuchs, Uwe and Wiechmann, J{\"u}rgen}
}
