@book{63588,
	author = {Wragg, E. C. and ebrary, Inc.},
	title = {An introduction to classroom observation},
	publisher = {Routledge,},
	year = {1999.},
	address = {London ;},
	edition = {2nd ed.},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10054922}
}