@book{222737,
	author = {Slater, Charles L.},
	title = {Understanding the principalship},
	publisher = {Emerald,},
	year = {2013.},
	series = {Advances in educational administration,},
	address = {Bingley, U.K. :},
	url = {http://www.emeraldinsight.com/1479-3660/19}
}