@book{19643,
	author = {Reigeluth, Charles M.},
	title = {Instructional-design theories and models /},
	publisher = {Lawrence Erlbaum Associates,},
	year = {1999},
	address = {Hillsdale, N.J. :},
	url = {http://www.loc.gov/catdir/enhancements/fy0709/83014185-d.html}
}