@book{5883,
	author = {Wragg, E. C.},
	title = {An introduction to classroom observation /},
	publisher = {Routledge,},
	year = {1999.},
	address = {London ;},
	edition = {2nd ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy0649/98036040-d.html}
}