@book{37240,
	author = {Day, Christopher. and Leithwood, Kenneth. and SpringerLink (Online service)},
	title = {Successful Principal Leadership In Times Of Change},
	publisher = {Springer Netherlands,},
	year = {2007.},
	series = {Studies In Educational Leadership ;},
	address = {Dordrecht :},
	url = {http://dx.doi.org/10.1007/1-4020-5516-1}
}